Recent progress on the long‐term stability of hydrogen evolution reaction electrocatalysts

InfoMat, Journal Year: 2022, Volume and Issue: 4(9)

Published: Aug. 23, 2022

Abstract Developing new methodologies to produce clean and renewable energy resources is pivotal for carbon‐neutral initiatives. Hydrogen (H 2 ) considered as an ideal resource due its nontoxic, pollution‐free, high utilization rate, calorific combustion value. Electrolysis of water driven by the electricity generated from sources (e.g., solar energy, wind energy) hydrogen attracts great efforts production with purity. Recently, breakthrough catalyst activity limit evolution reaction (HER) catalysts has received extensive attention. Comparatively, fewer reviews have focused on long‐term stability HER catalysts, which indeed decisive large‐scale electrolytic industrialization. Therefore, a systematic summary concentrated durability electrocatalysts would provide fundamental understanding electrocatalytic performance practical applications offer opportunities rational design highly performed electrocatalysts. This review summarizes research progress toward precious metals, transition metal‐free in past few years. It discusses challenges future perspectives. We anticipate that it valuable basis designing robust image

Language: Английский

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Rhodium nanocrystals on porous graphdiyne for electrocatalytic hydrogen evolution from saline water

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Sept. 5, 2022

The realization of the efficient hydrogen conversion with large current densities at low overpotentials represents development trend this field. Here we report atomic active sites tailoring through a facile synthetic method to yield well-defined Rhodium nanocrystals in aqueous solution using formic acid as reducing agent and graphdiyne stabilizing support. High-resolution high-angle annular dark-field scanning-transmission electron microscopy images show high-density steps on faces hexahedral Rh nanocrystals. Experimental results reveal formation stable sp-C~Rh bonds can stabilize further improve charge transfer ability system. density functional theory calculation solidly demonstrate exposed high stepped surfaces various metal affect electronic structure catalyst reduce overpotential resulting large-current production from saline water. This exciting result demonstrates unmatched electrocatalytic performance highly water electrolysis.

Language: Английский

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Fine-tune the electronic structure in Co-Mo based catalysts to give easily coupled HER and OER catalysts for effective water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 328, P. 122474 - 122474

Published: Feb. 15, 2023

Language: Английский

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Ultrafast self-heating synthesis of robust heterogeneous nanocarbides for high current density hydrogen evolution reaction

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: June 9, 2022

Abstract Designing cost-effective and high-efficiency catalysts to electrolyze water is an effective way of producing hydrogen. Practical applications require highly active stable hydrogen evolution reaction working at high current densities (≥1000 mA cm −2 ). However, it challenging simultaneously enhance the catalytic activity interface stability these catalysts. Herein, we report a rapid, energy-saving, self-heating method synthesize Mo 2 C/MoC/carbon nanotube by ultrafast heating cooling. The experiments density functional theory calculations reveal that numerous C/MoC hetero-interfaces offer abundant sites with moderate adsorption free energy ΔG H* (0.02 eV), strong chemical bonding between carbon heater/electrode significantly enhances mechanical owing instantaneous temperature. As result, catalyst achieves low overpotentials 233 255 mV 1000 1500 in 1 M KOH, respectively, overpotential shows only slight change after for 14 days, suggesting excellent high-current-density catalyst. promising activity, stability, productivity our can fulfil demands production various applications.

Language: Английский

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Continuous CO2 electrolysis using a CO2 exsolution-induced flow cell

Nature Energy, Journal Year: 2022, Volume and Issue: 7(10), P. 978 - 988

Published: Oct. 6, 2022

Language: Английский

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MoC Quantum Dots@N‐Doped‐Carbon for Low‐Cost and Efficient Hydrogen Evolution Reaction: From Electrocatalysis to Photocatalysis

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(27)

Published: April 9, 2022

Abstract Sustainable and highly efficient non‐noble metal catalysts could facilitate the realization of closed‐loop carbon‐neutral hydrogen (H 2 ) economy via low‐cost electrocatalytic (EC) or photocatalytic (PC) H evolution reaction (HER) from water. Herein, molybdenum carbide (MoC) quantum dots onto N‐doped porous carbon are in situ synthesized immobilized, resulting a bifunctional catalyst MoC@NC. Density functional theory calculation suggests that targeted has suitable Gibbs free‐energy (Δ G H* for adsorption atomic hydrogen, which is beneficial to both EC PC HERs. For HER, as‐prepared MoC@NC delivers low overpotential 160 mV at −10 mA cm −2 remarkable rate alkaline electrolytes. couple with 2D graphitic nitride (g‐C 3 N 4 ), significantly reduces HER energy barrier enhances separation efficiency photogenerated carriers, consequently, achieves an outstanding 1709 µmol h −1 g , 213‐fold pure g‐C . This study paves new avenue developing sustainable

Language: Английский

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Modulating Local Interfacial Bonding Environment of Heterostructures for Energy‐Saving Hydrogen Production at High Current Densities

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(12)

Published: Jan. 8, 2023

Abstract Coupling urea oxidation reaction (UOR) with hydrogen evolution (HER) is an effective energy‐saving technique for generation. However, exploring efficient bifunctional electrocatalysts under high current density still challenging. Herein, hierarchical Fe doped cobalt selenide coupled FeCo layered double hydroxide (Fe‐Co 0.85 Se/FeCo LDH) array as a self‐supported superior heterojunction electrode rationally designed both UOR and HER. The unique heterostructure facilitates electron transfer interface interactions through local interfacial Co‐Se/O‐Fe bonding environment modulation, improving kinetics intrinsic activity. As result, the heterostructured electrocatalyst exhibits ultralow potentials of −0.274 1.48 V to reach 500 mA cm −2 catalyzing HER UOR, respectively. Particularly, full electrolysis system driven by Fe‐Co LDH delivers 300 at relatively low potential 1.57 V, which 150 mV lower than conventional water electrolysis. combination in situ characterization theoretical analysis reveal that active sites adjustable electronic are induced heterojunction, facilitating decomposition stabilization intermediates UOR. This work inspires modulation optimize advanced H 2 production.

Language: Английский

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Highly Active Si Sites Enabled by Negative Valent Ru for Electrocatalytic Hydrogen Evolution in LaRuSi

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(32)

Published: June 3, 2022

The discovery and identification of novel active sites are paramount for deepening the understanding catalytic mechanism driving development remarkable electrocatalysts. Here, we reveal that genuine hydrogen evolution reaction (HER) in LaRuSi Si sites, not usually assumed Ru sites. has a peculiar negative valence state, which leads to strong binding Surprisingly, have Gibbs free energy adsorption is near zero (0.063 eV). moderate on during HER process also validated by situ Raman analysis. Based it, exhibits an overpotential 72 mV at 10 mA cm-2 alkaline media, close benchmark Pt/C. This work sheds light recognition real exploration innovative silicide

Language: Английский

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Engineering electron redistribution of bimetallic phosphates with CeO2 enables high-performance overall water splitting

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 453, P. 139796 - 139796

Published: Oct. 15, 2022

Language: Английский

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Unveiling the synergy of polymorph heterointerface and sulfur vacancy in NiS/Ni3S2 electrocatalyst to promote alkaline hydrogen evolution reaction

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 323, P. 122144 - 122144

Published: Nov. 11, 2022

Language: Английский

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