Recent Advances on Bimetallic Transition Metal Phosphides for Enhanced Hydrogen Evolution Reaction

Ogundipe, Taiwo Oladapo; Shen, Lisha; Yan, Changfeng; Lu, Zhuoxin; Yan, Chuanwei

doi:10.1002/slct.202200291

Cited by 8 publications

(3 citation statements)

References 190 publications

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“…43 In addition to the electronic effects, high electrical conductivities and electrochemically active surface areas (ECSAs) likely contributed to the high activities of the Au− Pt LbL films. Highly conductive supports for the Pt electrocatalysts have been introduced to facilitate fast charge transfer 3,44 and electron transport for HER kinetics. 45,46 The electrical conductivity of the Au−Pt LbL films was measured to be 8.7 × 10 4 S cm −1 , which was similar to that of bulk Pt (9.4 × 10 4 S cm −1 ) 47 owing to the ligand exchange-assisted LbL assembly.…”

Section: Resultsmentioning

confidence: 99%

Ligand-Exchange-Assisted Layer-by-Layer Assembly of Au–Pt Bimetallic Nanocomposite Films and Their Electrocatalytic Activities for Hydrogen Evolution Reaction

Lee,

Song,

Cho

et al. 2023

ACS Appl. Energy Mater.

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Platinum (Pt) is a popular electrocatalyst for the hydrogen evolution reaction (HER) for water splitting. However, a facile synthesis route with improved activity and stability remains to be established. In this study, Au–Pt bimetallic nanocomposite electrodes for the HER are prepared by ligand-exchange-assisted layer-by-layer (LbL) self-assembly methods. Pt and Au nanoparticles (NPs) are alternately deposited onto Ti electrodes paired with short alkyl amines. This process is accompanied by the removal of the preattached bulky surface ligands. The resulting Pt and Au NP LbL nanocomposite films are characterized by uniform thin-film depositions with high electrical conductivity (8.7 × 104 S cm–1). With the increase in the number of depositions, the overpotentials of the Au–Pt LbL samples gradually decrease and reach 66 mV at a current density of 10 mA cm–2 under an acidic condition of 0.5 M H2SO4, which is accomplished with a significantly small Pt loading (0.73 wt %). Furthermore, the overpotentials of the Au–Pt bimetallic LbL films are one-third of the Pt NP LbL films. The enhanced activity can be attributed to the synergistic effect of the d-band shift from the bimetallic heterostructure, high electrical conductivity, rapid charge transfer, and increased electrochemical surface area.

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Section: Resultsmentioning

confidence: 99%

Ligand-Exchange-Assisted Layer-by-Layer Assembly of Au–Pt Bimetallic Nanocomposite Films and Their Electrocatalytic Activities for Hydrogen Evolution Reaction

Lee,

Song,

Cho

et al. 2023

ACS Appl. Energy Mater.

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“…High exchange current density usually reflects the excellent performance of the HER reaction electrocatalyst. However, it should be noted that obtaining direct exchange current density is challenging, and we can only get the total current density from the Tafel equation experiments …”

Section: Her Electrocatalysts Requirementsmentioning

confidence: 99%

“…However, it should be noted that obtaining direct exchange current density is challenging, and we can only get the total current density from the Tafel equation experiments. 50 …”

Section: Her Electrocatalysts Requirementsmentioning

confidence: 99%

Metal Electrocatalysts for Hydrogen Production in Water Splitting

Kazemi,

Manteghi,

Tehrani

2024

ACS Omega

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The rising demand for fossil fuels and the resulting pollution have raised environmental concerns about energy production. Undoubtedly, hydrogen is the best candidate for producing clean and sustainable energy now and in the future. Water splitting is a promising and efficient process for hydrogen production, where catalysts play a key role in the hydrogen evolution reaction (HER). HER electrocatalysis can be well performed by Pt with a low overpotential close to zero and a Tafel slope of about 30 mV dec −1 . However, the main challenge in expanding the hydrogen production process is using efficient and inexpensive catalysts. Due to electrocatalytic activity and electrochemical stability, transition metal compounds are the best options for HER electrocatalysts. This study will focus on analyzing the current situation and recent advances in the design and development of nanostructured electrocatalysts for noble and non-noble metals in HER electrocatalysis. In general, strategies including doping, crystallization control, structural engineering, carbon nanomaterials, and increasing active sites by changing morphology are helpful to improve HER performance. Finally, the challenges and future perspectives in designing functional and stable electrocatalysts for HER in efficient hydrogen production from water-splitting electrolysis will be described.

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Cobalt Phthalocyanine‐Based Photo/Electrocatalysts for Hydrogen Evolution Reaction

Balogun,

Thole,

Masekela

et al. 2024

Adv Energy and Sustain Res

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Cobalt phthalocyanine (CoPc)‐based catalysts have garnered significant interest as efficient materials for hydrogen evolution reactions (HER) due to their abundant availability, low cost, tunable electronic structures, and unique light absorption performance. This review offers a thorough examination of the latest developments in CoPc‐based catalysts for HER. It entails a wide range of synthesis approaches, intrinsic characteristics, and catalytic mechanisms associated with these catalysts for HER. We also compare the photo/electrocatalytic performance of these catalysts using parameters like Tafel slope, exchange current density, overpotential, hydrogen yield, turnover frequency, stability, specific surface area, etc. The review shows that the commonly used electrolytes for electrocatalytic HER are KOH, LiClO4/PBS, and H2SO4, while for photocatalytic HER, triethylamine, water, and triethanolamine are frequently used. Among all the electrocatalysts understudied, poly[CoOTPc]‐KB and GO/4N‐CoPc are the best, owing to their lowest overpotentials and Tafel slopes. In terms of photocatalytic hydrogen production, CoPc/TiO2/Pt has better photocatalytic HER performance compared to its counterparts. This review also highlights the effects of incorporating CoPc with different materials on the photo/electrocatalytic HER performance. Furthermore, the review discusses the challenges and prospects, emphasizing the chances for improving and incorporating CoPc‐based catalysts as a viable option for hydrogen production in the future.

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Recent Advances on Bimetallic Transition Metal Phosphides for Enhanced Hydrogen Evolution Reaction

Cited by 8 publications

References 190 publications

Ligand-Exchange-Assisted Layer-by-Layer Assembly of Au–Pt Bimetallic Nanocomposite Films and Their Electrocatalytic Activities for Hydrogen Evolution Reaction

Ligand-Exchange-Assisted Layer-by-Layer Assembly of Au–Pt Bimetallic Nanocomposite Films and Their Electrocatalytic Activities for Hydrogen Evolution Reaction

Metal Electrocatalysts for Hydrogen Production in Water Splitting

Cobalt Phthalocyanine‐Based Photo/Electrocatalysts for Hydrogen Evolution Reaction

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