Electrochemical Water Splitting: Bridging the Gaps Between Fundamental Research and Industrial Applications

Energy & environment materials, Journal Year: 2022, Volume and Issue: 6(5)

Published: May 28, 2022

Electrochemical water splitting represents one of the most promising technologies to produce green hydrogen, which can help realize goal achieving carbon neutrality. While substantial efforts on a laboratory scale have been made for understanding fundamental catalysis and developing high‐performance electrocatalysts two half‐reactions involved in electrocatalysis, much less attention has paid doing relevant research larger scale. For example, few such researches done an industrial Herein, we review very recent endeavors bridge gaps between applications electrolysis. We begin by introducing fundamentals electrochemical then present comparisons testing protocol, figure merit, catalyst interest, manufacturing cost industry‐based water‐electrolysis research. Special is tracking surface reconstruction process identifying real catalytic species under different conditions, highlight significant distinctions corresponding mechanisms. Advances designs industry‐relevant electrolysis are also summarized, reveal progress moving practical forward accelerating synergies material science engineering. Perspectives challenges electrocatalyst design strategies proposed finally further lab‐scale large‐scale electrocatalysis applications.

Language: Английский

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Amorphous/Crystalline Heterostructure Transition-Metal-based Catalysts for High-Performance Water Splitting

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214916 - 214916

Published: Oct. 31, 2022

Language: Английский

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Rational Design of Transition Metal Phosphide‐Based Electrocatalysts for Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(7)

Published: Dec. 9, 2022

Abstract Developing efficient and inexpensive electrocatalysts for the hydrogen evolution reaction (HER) is critical to commercial viability of electrochemical clean energy technologies. Transition metal phosphides (TMPs), with merits abundant reserves, unique structure, tunable composition, high electronic conductivity, are recognized as attractive HER catalytic materials. Nevertheless, electrocatalytic activity TMPs still limited by various thorough issues inherent performance bottlenecks. In this review, these carefully sorted, corresponding reasonable explanations solutions elucidated on basis origins TMPs. Subsequently, highly targeted multiscale strategies improve comprehensively presented. Additionally, scientific constructing high‐efficiency TMP‐based proposed. Finally, process, mechanism research, catalyst construction, their application expansion mentioned challenges future directions research field. Expectedly, review offers professional guidelines rational design practical catalysts.

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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Pinpointing the axial ligand effect on platinum single-atom-catalyst towards efficient alkaline hydrogen evolution reaction

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

Published: Nov. 12, 2022

Developing active single-atom-catalyst (SAC) for alkaline hydrogen evolution reaction (HER) is a promising solution to lower the green cost. However, correlations are not clear between chemical environments around active-sites and their desired catalytic activity. Here we study group of SACs prepared by anchoring platinum atoms on NiFe-layered-double-hydroxide. While maintaining homogeneity Pt-SACs, various axial ligands (-F, -Cl, -Br, -I, -OH) employed via facile irradiation-impregnation procedure, enabling us discover definite chemical-environments/performance correlations. Owing its high first-electron-affinity, chloride chelated Pt-SAC exhibits optimized bindings with hydroxide, which favor sluggish water dissociation further promote HER. Specifically, it shows mass-activity 30.6 A mgPt-1 turnover frequency 30.3 H2 s-1 at 100 mV overpotential, significantly higher than those state-of-the-art Pt-SACs commercial Pt/C catalyst. Moreover, energy efficiency 80% obtained electrolyser assembled using above catalyst under practical-relevant conditions.

Language: Английский

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Facilitating alkaline hydrogen evolution reaction on the hetero-interfaced Ru/RuO2 through Pt single atoms doping

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 16, 2024

Abstract Exploring an active and cost-effective electrocatalyst alternative to carbon-supported platinum nanoparticles for alkaline hydrogen evolution reaction (HER) have remained elusive date. Here, we report a catalyst based on single atoms (SAs) doped into the hetero-interfaced Ru/RuO 2 support (referred as Pt-Ru/RuO ), which features low HER overpotential, excellent stability distinctly enhanced cost-based activity compared commercial Pt/C Ru/C in 1 M KOH. Advanced physico-chemical characterizations disclose that sluggish water dissociation is accelerated by RuO while Pt SAs metallic Ru facilitate subsequent H* combination. Theoretical calculations correlate with experimental findings. Furthermore, only requires 1.90 V reach A cm −2 delivers high price anion exchange membrane electrolyzer, outperforming benchmark Pt/C. This research offers feasible guidance developing noble metal-based catalysts performance cost toward practical H production.

Language: Английский

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Unusual Sabatier principle on high entropy alloy catalysts for hydrogen evolution reactions

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 8, 2024

Abstract The Sabatier principle is widely explored in heterogeneous catalysis, graphically depicted volcano plots. most desirable activity located at the peak of volcano, and further advances past this optimum are possible by designing a catalyst that circumvents limitation entailed principle. Herein, density functional theory calculations, we discovered an unusual on high entropy alloy (HEA) surface, distinguishing “just right” (Δ G H* = 0 eV) hydrogen evolution reaction (HER). A new descriptor was proposed to design HEA catalysts for HER. As proof-of-concept, synthesized PtFeCoNiCu endows catalytic performance HER with overpotential 10.8 mV −10 mA cm −2 4.6 times higher intrinsic over state-of-the-art Pt/C. Moreover, can be extended other reactions.

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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Ir Nanoparticles Anchored on Metal‐Organic Frameworks for Efficient Overall Water Splitting under pH‐Universal Conditions

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(17)

Published: March 2, 2023

The construction of high-activity and low-cost electrocatalysts is critical for efficient hydrogen production by water electrolysis. Herein, we developed an advanced electrocatalyst anchoring well-dispersed Ir nanoparticles on nickel metal-organic framework (MOF) Ni-NDC (NDC: 2,6-naphthalenedicarboxylic) nanosheets. Benefiting from the strong synergy between MOF through interfacial Ni-O-Ir bonds, synthesized Ir@Ni-NDC showed exceptional electrocatalytic performance evolution reaction (HER), oxygen (OER) overall splitting in a wide pH range, superior to commercial benchmarks most reported electrocatalysts. Theoretical calculations revealed that charge redistribution bridge induced optimization H2 O, OH* H* adsorption, thus leading accelerated electrochemical kinetics HER OER. This work provides new clue exploit bifunctional pH-universal splitting.

Language: Английский

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Tailoring a local acid-like microenvironment for efficient neutral hydrogen evolution

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: July 14, 2023

Electrochemical hydrogen evolution reaction in neutral media is listed as the most difficult challenges of energy catalysis due to sluggish kinetics. Herein, Ir-HxWO3 catalyst readily synthesized and exhibits enhanced performance for reaction. HxWO3 support functioned proton sponge create a local acid-like microenvironment around Ir metal sites by spontaneous injection protons WO3, evidenced spectroscopy electrochemical analysis. Rationalize revitalized lattice-hydrogen species located interface are coupled with Had atoms on metallic surfaces via thermodynamically favorable Volmer-Tafel steps, thereby fast Elaborated demonstrates activity low overpotential 20 mV at 10 mA cm-2 Tafel slope 28 dec-1, which even comparable those acidic environment. The concept exemplified this work offer possibilities tailoring regulate catalytic pathway.

Language: Английский

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