Electron-enriched Pt induced by CoSe2 promoted bifunctional catalytic ability for low carbon alcohol fuel electro-reforming of hydrogen evolution

Zhou, Yang; Wang, Qiaowei; Tian, Xinlong; Chang, Jinfa; Feng, Ligang

doi:10.1016/j.jechem.2022.08.009

Cited by 73 publications

(48 citation statements)

References 51 publications

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“…Adsorption tends to be stronger in the d-band center at a higher location, resulting in higher EOR activity for INPG/Pd. The ligand and strain effects have also been reported in the case of Au@Pt and others. − Third, the pure Pd surface acts as the primary active site for the degradation and dehydrogenation of ethanol. CO ad can be produced by breaking of the C–C bond to poison the Pd active sites during the EOR in alkaline media.…”

Section: Resultsmentioning

confidence: 67%

“…These results indicate a strong electronic effect between Pd and INPG. The electronic effects have also been reported in the cases of Pt/Se, Pt/Cu/Mo 2 C, and Pt/CoSe 2 …”

Section: Resultsmentioning

confidence: 71%

“…These results indicate a strong electronic effect between Pd and INPG. The electronic effects have also been reported in the cases of Pt/Se,32 Pt/Cu/Mo 2 C,33 and Pt/ CoSe 2 .34 CV analysis was carried out in a 1 M KOH solution at a sweep rate of 50 mV s −1 . Figure4adepicts the CV curves recorded for different INPG/Pd catalysts and for INPG and ITO glass/Pd as references.…”

mentioning

confidence: 88%

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Ethanol Electrooxidation on an Island-Like Nanoporous Gold/Palladium Electrocatalyst in Alkaline Media: Electrocatalytic Properties and an In Situ Surface-Enhanced Raman Spectroscopy Study

Tang

Huang

et al. 2022

Inorg. Chem.

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The design of electrocatalysts with high activity and the understanding of the reaction mechanism for the ethanol oxidation reaction (EOR) are pivotal for commercializing direct ethanol fuel cells (DEFCs). Herein, island-like nanoporous gold/palladium (INPG/Pd) is designed as a highly efficient EOR electrocatalyst. For a better understanding of the reaction mechanism, in situ surface-enhanced Raman spectroscopy (SERS) in conjunction with H–D isotope replacement is used to investigate the dissociation and oxidation of CH3CH2OH on the INPG/Pd electrode, with a focus on identifying significant intermediate species in the reaction process. The results show that INPG/Pd has a higher electrocatalytic performance than INPG and indium–tin oxide (ITO) glass/palladium (Pd) due to the synergistic effect of NPG and Pd. INPG/Pd-10 shows the highest specific activity, the strongest charge-transfer ability, and relatively good stability. INPG/Pd presents better SERS sensitivity than ITO glass/Pd because of the plasma enhancement effect of nanoporous Au. The in situ Raman spectral results suggest that the oxidation of ethanol proceeds via a dual-pathway (C1 and C2) reaction mechanism. Dehydrogenation of ethanol can form acetaldehyde (CH3CHO) at −0.4 V. Meanwhile, the adsorbed acetaldehyde is oxidized to acetate from approximately −0.4 V, with the potential moving positively, which is the so-called C2 pathway. Alternatively, in the C1 pathway, CH3CHO and CH3CH2OH decomposed to intermediate species (adsorbed CO) on the INPG/Pd electrode due to C–C bond breaking at potentials of approximately −0.2 V. Subsequently, the CO species is oxidized to CO2 at more positive potentials.

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Section: Resultsmentioning

confidence: 67%

“…These results indicate a strong electronic effect between Pd and INPG. The electronic effects have also been reported in the cases of Pt/Se, Pt/Cu/Mo 2 C, and Pt/CoSe 2 …”

Section: Resultsmentioning

confidence: 71%

mentioning

confidence: 88%

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Ethanol Electrooxidation on an Island-Like Nanoporous Gold/Palladium Electrocatalyst in Alkaline Media: Electrocatalytic Properties and an In Situ Surface-Enhanced Raman Spectroscopy Study

Tang

Huang

et al. 2022

Inorg. Chem.

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“…Furthermore, in the Co 2p of Co(OH) 2 /CC (Figure S5), only Co 2+ and satellite peaks can be detected. 44,45 The peaks at 54. 44 (Figure 4c) were all moved to the positive binding energy direction by ∼0.10 eV.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Figure a shows the polarization curves of catalysts. Pt/C just needed 49 mV to arrive at 10 mA/cm –2 (η 10 ), while bare CC needed 497 mV, and the CoSe 2 -V Se /CC- 15 sample exhibited excellent HER activity (η 10 = 88 mV) compared to CoSe 2 /CC (η 10 = 223 mV), CoSe 2 -V Se /CC- 10 (η 10 = 191 mV), and CoSe 2 -V Se /CC- 20 (η 10 = 135 mV) . Their overpotentials at 10, 50, and 100 mA cm –2 were all examined (Figure S7) and CoSe 2 -V Se /CC- 15 always exhibited the best HER performance although at higher current densities.…”

Section: Resultsmentioning

confidence: 99%

Engineering Selenium Vacancies on CoSe₂ Nanoarrays for Alkaline Hydrogen Evolution

Pan

Cao

et al. 2023

ACS Appl. Nano Mater.

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The development of highly efficient nonnoble metals toward hydrogen evolution reaction (HER) electrocatalysts is significant for producing hydrogen via water electrolysis. Selenides are becoming increasingly attractive owing to their excellent HER activity. Herein, CoSe2 nanorods were successfully manufactured on a carbon cloth (CC) and selenium vacancies were obtained using a plasma cleaner (CoSe2-VSe/CC) to enhance their intrinsic catalytic activity. The synthetic catalyst exhibited a lower overpotential of 88 mV at 10 mA cm–2 in 1 M KOH and high durability over 100 h at 100 mA cm–2, which can be ascribed to the increased electrochemical surface area and rapid electron transfer. In addition, density functional theory (DFT) calculations showed that introducing Se vacancies optimized the hydrogen adsorption energy on the Se site and reduced the transition-state energy barrier of water dissociation. This study laid a firm foundation for preparing high-performance and stable electrocatalysts via anion defect engineering.

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Advancements in Ruthenium (Ru)‐Based Heterostructure Catalysts: Overcoming Bottlenecks in Catalysis for Hydrogen Evolution Reaction

Kuang,

Yang,

Feng

2024

Advanced Energy Materials

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Investigating clean and sustainable hydrogen generation from water splitting requires cost‐effective and highly efficient electrocatalysts for the hydrogen evolution reaction (HER). Ruthenium (Ru)‐based heterostructure catalysts have emerged as promising alternatives to precious Pt, offering significant potential to overcome current bottlenecks. Recent advancements in Ru‐based heterostructure catalysts have focused on achieving a balance between catalytic activity and stability. An overview of these developments provides insights into catalytic mechanisms and facilitates the development of novel catalysts. This review begins with an exploration of the enhanced activity of heterostructure catalysts, followed by a critical summary of synthetic strategies employed to fabricate these catalysts and their catalytic performances for HER. Attention is then directed to experimental endeavors aimed at enhancing the HER performance of Ru‐based heterostructure catalysts. Finally, the opportunities and challenges in developing heterostructure catalysts from the perspectives of material design and synthesis are discussed. Through these discussions, a comprehensive understanding of Ru‐based heterostructure catalysts and inspiring future research directions is the aim to provide.

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Electron-enriched Pt induced by CoSe2 promoted bifunctional catalytic ability for low carbon alcohol fuel electro-reforming of hydrogen evolution

Cited by 73 publications

References 51 publications

Ethanol Electrooxidation on an Island-Like Nanoporous Gold/Palladium Electrocatalyst in Alkaline Media: Electrocatalytic Properties and an In Situ Surface-Enhanced Raman Spectroscopy Study

Ethanol Electrooxidation on an Island-Like Nanoporous Gold/Palladium Electrocatalyst in Alkaline Media: Electrocatalytic Properties and an In Situ Surface-Enhanced Raman Spectroscopy Study

Engineering Selenium Vacancies on CoSe₂ Nanoarrays for Alkaline Hydrogen Evolution

Advancements in Ruthenium (Ru)‐Based Heterostructure Catalysts: Overcoming Bottlenecks in Catalysis for Hydrogen Evolution Reaction

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Electron-enriched Pt induced by CoSe2 promoted bifunctional catalytic ability for low carbon alcohol fuel electro-reforming of hydrogen evolution

Cited by 73 publications

References 51 publications

Ethanol Electrooxidation on an Island-Like Nanoporous Gold/Palladium Electrocatalyst in Alkaline Media: Electrocatalytic Properties and an In Situ Surface-Enhanced Raman Spectroscopy Study

Ethanol Electrooxidation on an Island-Like Nanoporous Gold/Palladium Electrocatalyst in Alkaline Media: Electrocatalytic Properties and an In Situ Surface-Enhanced Raman Spectroscopy Study

Engineering Selenium Vacancies on CoSe2 Nanoarrays for Alkaline Hydrogen Evolution

Advancements in Ruthenium (Ru)‐Based Heterostructure Catalysts: Overcoming Bottlenecks in Catalysis for Hydrogen Evolution Reaction

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Engineering Selenium Vacancies on CoSe₂ Nanoarrays for Alkaline Hydrogen Evolution