Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (3): 611-635.DOI: 10.1016/S1872-2067(21)63899-8
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Hui Chena, Bo Zhangb, Xiao Lianga, Xiaoxin Zoua,*()
Received:
2021-04-29
Revised:
2021-04-29
Online:
2022-03-18
Published:
2022-02-18
Contact:
Xiaoxin Zou
About author:
Xiaoxin Zou has received his Ph.D. in inorganic chemistry from Jilin University (China) in June 2011; and then moved to the University of California, Riverside, and Rutgers, The State University of New Jersey, as a postdoctoral scholar from July 2011 to October 2013. He is currently a professor at the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry in Jilin University. His research interests are in hydrogen energy materials chemistry, comprising the elucidation of the atomic basis for water-splitting electrocatalysts, the prediction and searching of efficient catalysts with novel crystal structures as well as the development of original catalyst design principles. Some of his recent progresses include the computation-driven structural design/engineering of water splitting catalysts, the structural understanding and synthetic methods of interstitial intermetallic catalysts, the design principles of low-iridium oxygen-evolution catalysts for PEM electrolyzers, and the synthetic strategies of large-area, highly stable electrode materials. He has authored 80+ peer-reviewed papers and 10 patents. He joined the editorial board of Chin. J. Catal. in 2020.
Supported by:
Hui Chen, Bo Zhang, Xiao Liang, Xiaoxin Zou. Light alloying element-regulated noble metal catalysts for energy-related applications[J]. Chinese Journal of Catalysis, 2022, 43(3): 611-635.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63899-8
Fig. 1. Light elements and noble metal elements contained in this review for the construction of alloy catalysts; r, χ, and EC represent atomic radius, electronegativity, and electronic configuration, respectively.
Fig. 2. Stacking structures of pure Pd with fcc atomic arrangements (a), PdHx alloy comprising a disordered hydrogen distribution in fcc-Pd lattices (b), PdBx alloy comprising a disordered boron distribution in hcp-Pd lattices (c), Pd2B comprising an ordered boron distribution in hcp-Pd lattices (d). Note that fcc represents an a-b-c-a-b-c… stacking pattern, and hcp represents an a-b-a-b-… stacking pattern.
Fig. 3. Summary of the main functions of light alloying elements affecting catalytic activity, including phase transition (a), charge transfer (b), strain effect (c), ligand effect (d), ensemble effect (e), and subsurface chemistry (f).
Fig. 4. (a) Formation energies of RhX (X = B, C, and N), and integrated COHP values of Rh?X and X?X bonding; (b) Crystal structure of RhB; (c) Calculated free-energy diagrams of RhB, hcp-Rh, fcc-Rh, and Pt for HER at equilibrium potential. (a?c) Reproduced with permission [48]. Copyright 2021, Royal Society of Chemistry. (d) Pd d-band center and ΔGH* of Pd-B models in which interstitial B atoms vary from sub-surface to bulk; (e) Volcano plot displaying the ΔGH* values over Pd-B models with different concentrations of subsurface boron as a function of their surface Pd d-band centers; (f) Comparison of electrochemical active surface areas (ECSA) and ECSA-normalized specific activities for Pd2B, Pd, Pt, and two disordered B-doped Pd. (d?f) Reproduced with permission [30]. Copyright 2021, Elsevier.
Fig. 5. Summary of the main strategies for light element incorporation, including in-situ formation during catalysis (a), diffusion from the supports (b), wet chemical reduction (c), and high-temperature solid-state methods (d).
Fig. 6. (a) Schematic of hydrogen and carbon atoms dissolving in Pd catalysts and modifying the selectivity during alkyne hydrogenation. Reproduced with permission [14]. Copyright 2008, American Association for the Advancement of Science. (b) Schematic of boron diffusion from a porous BN support to a palladium subsurface. Reproduced with permission [66]. Copyright 2020, Wiley-VCH. (c) Schematic of the wet chemical synthesis of Pd-H nanostructures and lattice spacing changes from Pd to Pd-H. Reproduced with permission [33]. Copyright 2020, Chinese Chemical Society. (d) Selective synthesis of four phase-pure Ru-B intermetallics through solid state reactions. Reproduced with permission [99]. Copyright 2020, Royal Society of Chemistry.
Fig. 8. (a) Schematic of the octahedral interstices (O sites) and tetrahedral interstices (T sites) in Pd hydride; dDPC (b) and iDPC (c) STEM images of PdHx. Reproduced with permission [67]. Copyright 2020, Wiley-VCH. (d) Schematic of the in situ EELS measurement on (e) a single Pd nanocrystal. (f,g) EEL spectra recorded on the Pd nanocrystal at varying H2 pressures. Reproduced with permission [108]. Copyright 2014, Nature Research.
Fig. 9. Structure (a) and neutron diffraction pattern (b) of PdD0.363 nanoparticles. Reproduced with permission [111]. Copyright 2016, American Chemical Society.
Fig. 10. (a) Schematic of in situ ATR-SEIRAS in conjunction with DEMS, GC, and NMR analysis during Pd-catalyzed CO2RR; (b) Variation of CO coverages on Pd and Pd-B catalysts over potential. Reproduced with permission [32]. Copyright 2008, American Association for the Advancement of Science.
Fig. 11. Schematic of the main catalytic reactions studied using light element-modified noble metal systems (left: electrocatalysis; right: thermocatalysis).
Catalyst | Synthesis method | H source | Structure | Reaction a | Ref. |
---|---|---|---|---|---|
PdH0.4 nanocubes | two-step wet chemical method | DMF | fcc structure | CO2RR | [ |
PdHx nanoparticles | In-situ formation during catalysis | H2 | fcc structure (α+β phase) | CO2RR | [ |
Pd-H icosahedra | eet chemical method | DMF | fcc structure | ORR | [ |
PdH0.7 nanocubes | eet chemical method | DMF | fcc structure (β phase) | ORR | [ |
PdH0.43 nanocrystals | solvothermal method | n-butylamine | fcc structure | FAOR | [ |
PdHx nanocrystals | H absorption under CO/H2 mixture | H2 | fcc structure (β phase) | FAOR | [ |
PdH cubes and octahedra nanocrystals | wet chemical method | DMF | fcc structure (β phase) | FAOR/MOR | [ |
PdH0.43 nanocrystals | wet chemical method | DMF | fcc structure (β phase) | MOR | [ |
PdH0.43 nanoparticles | solvothermal method | n-butylamine | fcc structure | COOR | [ |
Nanoporous PdH0.43 | solvothermal method | DMF | fcc structure | NRR | [ |
PdHx nanoparticles | in situ formation during catalysis | H2 | fcc structure | HER | [ |
RhPdH bimetallene nanosheets | solvothermal method | formaldehyde | fcc structure (β phase) | HER | [ |
RhPd-H nanoparticles | solvothermal method | acetaldehyde | fcc structure | HER | [ |
MoPdH nanosheets | solvothermal method | oleylamine | fcc structure | MOR, EOR, EGOR | [ |
Table 1 List of synthesis, structure, and catalytic application of some representative H-modified noble metal catalysts.
Catalyst | Synthesis method | H source | Structure | Reaction a | Ref. |
---|---|---|---|---|---|
PdH0.4 nanocubes | two-step wet chemical method | DMF | fcc structure | CO2RR | [ |
PdHx nanoparticles | In-situ formation during catalysis | H2 | fcc structure (α+β phase) | CO2RR | [ |
Pd-H icosahedra | eet chemical method | DMF | fcc structure | ORR | [ |
PdH0.7 nanocubes | eet chemical method | DMF | fcc structure (β phase) | ORR | [ |
PdH0.43 nanocrystals | solvothermal method | n-butylamine | fcc structure | FAOR | [ |
PdHx nanocrystals | H absorption under CO/H2 mixture | H2 | fcc structure (β phase) | FAOR | [ |
PdH cubes and octahedra nanocrystals | wet chemical method | DMF | fcc structure (β phase) | FAOR/MOR | [ |
PdH0.43 nanocrystals | wet chemical method | DMF | fcc structure (β phase) | MOR | [ |
PdH0.43 nanoparticles | solvothermal method | n-butylamine | fcc structure | COOR | [ |
Nanoporous PdH0.43 | solvothermal method | DMF | fcc structure | NRR | [ |
PdHx nanoparticles | in situ formation during catalysis | H2 | fcc structure | HER | [ |
RhPdH bimetallene nanosheets | solvothermal method | formaldehyde | fcc structure (β phase) | HER | [ |
RhPd-H nanoparticles | solvothermal method | acetaldehyde | fcc structure | HER | [ |
MoPdH nanosheets | solvothermal method | oleylamine | fcc structure | MOR, EOR, EGOR | [ |
Fig. 12. Schematics of the synthetic route (a) and the proposed NRR pathway (b) for nanoporous PdH0.43. Reproduced with permission [123]. Copyright 2020, Wiley-VCH. (c) XRD and of PdH0.43 nanocrystals; (d) MOR catalytic properties of Pd and PdH0.43 nanocrystals. (b,c) Reproduced with permission [68]. Copyright 2015, American Chemical Society.
Fig. 13. (a) Calculated ΔGH* values at different sites on RhPd (111) and RhPd-H (111) surfaces; (b) Catalytic activity comparison of RhPd-H, RhPd, and reference catalysts. (a,b) Reproduced with permission [137]. Copyright 2019, American Chemical Society. (c) Schematic of the formation energy of 2D RhPd alloy and 2D RhPd alloy hydride; (d) TEM image of RhPd-H bimetallene nanosheets. (c,d) Reproduced with permission [34]. Copyright 2020, American Chemical Society.
Catalyst | Synthesis method | B source | Structure | Reaction | Ref. |
---|---|---|---|---|---|
B-doped Pd nanoparticles | wet chemical reduction | BH3,THF | fcc structure | alkyne hydrogenation | [ |
Porous BN supported Pd | impregnation | BN | fcc structure | alkyne hydrogenation | [ |
Mesoporous Pd2B nanoparticles | wet chemical method | DMAB | hcp and fcc structure | p-nitrophenol reduction | [ |
Pd-B films | electrochemical deposition | DMAB | fcc structure | CO2RR | [ |
B-doped Pd nanoparticles | wet chemical method | Boric acid | fcc structure | formate oxidation | [ |
PdCuB nanoparticles | wet chemical method | DMAB | fcc structure | EOR | [ |
Mesoporous Pd-B nanospheres | wet chemical method | DMAB | fcc structure | EOR | [ |
RuB | metallothermic reduction | MgB2 | Hexagonal structure | HER | [ |
RuB2 | solid-state metathesis | MgB2 | Orthorhombic structure | HER | [ |
RhB | solid-phase reaction | MgB2 | hcp structure | HER | [ |
Pd2B | solid-phase reaction | MgB2 | hcp structure | HER | [ |
Rh-Ni-B nanoparticles | wet chemical method | NaBH4 | fcc structure | hydrous hydrazine decomposition | [ |
B-doped Pd nanoparticles | wet chemical method | NaBH4, DMAB | fcc structure | gormic acid decomposition | [ |
B-doped Pd nanoparticles | wet chemical method | DMAB | fcc structure | ORR | [ |
Table 2 List of structure, synthesis, and catalytic application of some representative B-modified noble metal catalysts.
Catalyst | Synthesis method | B source | Structure | Reaction | Ref. |
---|---|---|---|---|---|
B-doped Pd nanoparticles | wet chemical reduction | BH3,THF | fcc structure | alkyne hydrogenation | [ |
Porous BN supported Pd | impregnation | BN | fcc structure | alkyne hydrogenation | [ |
Mesoporous Pd2B nanoparticles | wet chemical method | DMAB | hcp and fcc structure | p-nitrophenol reduction | [ |
Pd-B films | electrochemical deposition | DMAB | fcc structure | CO2RR | [ |
B-doped Pd nanoparticles | wet chemical method | Boric acid | fcc structure | formate oxidation | [ |
PdCuB nanoparticles | wet chemical method | DMAB | fcc structure | EOR | [ |
Mesoporous Pd-B nanospheres | wet chemical method | DMAB | fcc structure | EOR | [ |
RuB | metallothermic reduction | MgB2 | Hexagonal structure | HER | [ |
RuB2 | solid-state metathesis | MgB2 | Orthorhombic structure | HER | [ |
RhB | solid-phase reaction | MgB2 | hcp structure | HER | [ |
Pd2B | solid-phase reaction | MgB2 | hcp structure | HER | [ |
Rh-Ni-B nanoparticles | wet chemical method | NaBH4 | fcc structure | hydrous hydrazine decomposition | [ |
B-doped Pd nanoparticles | wet chemical method | NaBH4, DMAB | fcc structure | gormic acid decomposition | [ |
B-doped Pd nanoparticles | wet chemical method | DMAB | fcc structure | ORR | [ |
Fig. 14. (a) Schematic of the synthesis; (b) TEM image of mesoporous Pd-B alloy nanospheres. (a,b) Reproduced with permission [147]. Copyright 2019, Royal Society of Chemistry. SEM (c), TEM and high-resolution TEM (d) of images of hcp-mesoPd2B. (c,d) Reproduced with permission [49]. Copyright 2020, American Chemical Society.
Fig. 15. (a) Schematic of the effect of metal-boron orbital interaction on hydrogen adsorption for metal-boron intermetallics; (b) A volcano plot exhibiting the exchange current densities as a function of ΔGH* values for different HER catalysts. (a,b) Reproduced with permission [53]. Copyright 2020, Wiley-VCH. (c) Crystal structures of RuB2; (d) Fitted linear relationship between the ΔGH* values and the metal d-band center for MB2, Pt, and Ru; (e) HER polarization curves for RuB2 and Pt/C in alkaline electrolyte. (c?e) Reproduced with permission [98]. Copyright 2019, Wiley-VCH.
Fig. 16. SEM (a) and TEM (d) images of C-Au catalysts supported on ordered mesoporous carbon; (c) Energy profiles for H2 dissociation at Au and C-Au surfaces. (a?c) Reproduced with permission [80]. Copyright 2020, Nature Research. Bright-field (BF)-STEM (d) and ABF-STEM (e) images of Rh2C. The inset of (e) shows the structural model of Rh2C. (f) ΔGH* values for HER of Rh2C, Rh, and Pd, respectively. (d?f) Reproduced with permission [81]. Copyright 2020, American Chemical Society.
Fig. 17. (a) Schematics of structural-dependent selectivity for NH3 catalytic oxidation over supported Pd nanoparticles. The Pd, N, H, and O atoms are in green, blue, white and red, respectively. (b) In situ Pd L3-edge XANES spectra of supported Pd catalysts in different gas environments. (c) Catalytic behavior of supported Pd catalysts for NH3 oxidation at increasing temperatures. Reproduced with permission [15]. Copyright 2019, Nature Publishing Group.
Fig. 18. (a) Schematic of the synthesis of Pd3S; (b) Structural resemblance of Pd3S (left) and Pd4S (right) surfaces; (c) Catalytic activity for alkyne semi-hydrogenation as a function of the differential adsorption energy of acetylene and ethene for Pd3S, Pd4S, and reference catalysts. (a?c) Reproduced with permission [54]. Copyright 2018, Nature Publishing Group. (d) TEM image of AgP2 nanocrystals; (e) Schematic of the selective CO2-to-syngas reaction on AgP2. (d,e) Reproduced with permission [50]. Copyright 2019, Nature Publishing Group.
Fig. 19. (a) Schematic of the interstitial Si incorporation strategy for promoting Ru top site from subordinate to dominant status; (b) HER polarization curves of RuSi, Ru, Pt, and Si in acidic electrolyte. Reproduced with permission [55]. Copyright 2019, Wiley-VCH. (c) Proposed catalytic activation pathway for ammonia synthesis over LaRuSi; (d) Catalytic performances for ammonia synthesis over LaRuSi, CaRuSi, and LaRu2Si2. Reproduced with permission [94]. Copyright 2019, Wiley-VCH.
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