Electrocatalytic water oxidation of coral-like porous Zn-CoP nanohybrids synergistically inspired by photothermal and photoelectronic effects

Ma, Zhanhong; Wang, Shasha; Lu, Xuyun; Chang, Yanan; Bao, Jianchun; Liu, Ying

doi:10.1039/d3ta01890c

Cited by 3 publications

(1 citation statement)

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“…The low Tafel slope value (62 mV dec –1 ) reveals higher OER kinetics for the Fe 0.5 CoNi 0.5 P catalyst, which is markedly lower than the commercial IrO 2 (127 mV dec –1 ) and the other controls (Figure e and Table S5). This fact may be attributed to the presence of multimetals in the TMP with possible multiple oxidation states at the surface . This increases the favorable adsorption/desorption of reactive species (*O, *OH, and *OOH) on these oxidized active sites in alkaline medium as corroborated from XPS and DFT studies in a later section.…”

Section: Resultsmentioning

confidence: 53%

Experimental and Computational Insights into the Overall Water Splitting Reaction by the Fe–Co–Ni–P Electrocatalyst

Kumar,

Antil,

Kumar

et al. 2023

ACS Appl. Mater. Interfaces

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Nonprecious transition-metal phosphides (TMPs) are versatile materials with tunable electronic and structural properties that could be promising as catalysts for energy conversion applications. Despite the facts, TMPs are not explored thoroughly to understand the chemistry behind their rich catalytic properties for the water splitting reaction. Herein, spiky ball-shaped monodispersed TMP nanoparticles composed of Fe, Co, and Ni are developed and used as efficient electrocatalysts for hydrogen and oxygen evolution reaction (HER, OER), and overall water splitting in alkaline medium; and their surface chemistry was explored to understand the reaction mechanism. The optimized Fe 0.5 CoNi 0.5 P catalyst shows attractive activities of HER and OER with low overpotentials and Tafel slopes, and with high mass activities, turnover frequencies, and exchange current densities. When applied to overall water splitting, the electrolyzer Fe 0.5 CoNi 0.5 P||Fe 0.5 CoNi 0.5 P cell can reach a 10 mA cm −2 current density at cell voltages of only 1.52 and 1.56 V in 1.0 M and 30 wt % KOH, respectively, much lower than those of commercial IrO 2 ||Pt/C. The optimized electrolyzer with sizable numbers of chemically active sites exhibits superior durability up to 70 h and 5000 cycles in 1.0 M KOH and can attain a current density as high as 1000 mA cm −2 , showing a class of efficient bifunctional electrocatalysis. Experimental and density functional theory-based mechanistic analyses reveal that surface reconstruction takes place in the presence of KOH to form the TMP precatalyst, which results in high coverage of oxygen active species for the OER with a low apparent activation energy (E a ) for conversion of *OOH to O 2 . These also evidenced the thermoneutral adsorption of H* for the efficient HER half-reaction.

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Section: Resultsmentioning

confidence: 53%

Experimental and Computational Insights into the Overall Water Splitting Reaction by the Fe–Co–Ni–P Electrocatalyst

Kumar,

Antil,

Kumar

et al. 2023

ACS Appl. Mater. Interfaces

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Built‐In Electric Field Boosted Overall Water Electrolysis at Large Current Density for the Heterogeneous Ir/CoMoO₄ Nanosheet Arrays

Chang,

Lu,

Wang

et al. 2024

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Advanced bifunctional electrocatalysts are essential for propelling overall water splitting (OWS) progress. Herein, relying on the obvious difference in the work function of Ir (5.44 eV) and CoMoO4 (4.03 eV) and the constructed built‐in electric field (BEF), an Ir/CoMoO4/NF heterogeneous catalyst, with ultrafine Ir nanoclusters (1.8 ± 0.2 nm) embedded in CoMoO4 nanosheet arrays on the surface of nickel foam skeleton, is reported. Impressively, the Ir/CoMoO4/NF shows remarkable electrocatalytic bifunctionality toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), especially at large current densities, requiring only 13 and 166 mV to deliver 10 and 1000 mA cm−2 for HER and 196 and 318 mV for OER. Furthermore, the Ir/CoMoO4/NF||Ir/CoMoO4/NF electrolyzer demands only 1.43 and 1.81 V to drive 10 and 1000 mA cm−2 for OWS. Systematical theoretical calculations and tests show that the formed BEF not only optimizes interfacial charge distribution and the Fermi level of both Ir and CoMoO4, but also reduces the Gibbs free energy (ΔGH*, from 0.25 to 0.03 eV) and activation energy (from 13.6 to 8.9 kJ mol−1) of HER, the energy barrier (from 3.47 to 1.56 eV) and activation energy (from 21.1 to 13.9 kJ mol−1) of OER, thereby contributing to the glorious electrocatalytic bifunctionality.

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The Role of Photo in Oxygen Evolution Reaction: A Review

Feng,

Dai,

Shi

et al. 2024

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Photo enhanced oxygen evolution reaction has recently emerged as an advanced strategy with great application prospects for highly efficient energy conversion and storage. In the course of photo enhanced oxygen evolution reactions, the other works focus has predominantly centered on catalysts while inadvertently overlooking the pivotal role of photo. Consequently, this manuscript embarks upon a comprehensive review of recent advancements in photo‐driven, aiming to illuminate this critical dimension. A detailed introduction to the photothermal effect, photoelectronic effect, photon‐induced surface plasmon resonance, photo and heterojunction, photo‐induced reversible geometric conversion, photo‐induced energy barrier reduction, photo‐induced chemical effect, photo‐charging, and the synthesis of laser/photo‐assisted catalysts, offering prospects for the development of each case is provided. A detailed introduction to the photothermal effect, photoelectronic effect, photon‐induced surface plasmon resonance, photo and heterojunction, photo‐induced reversible geometric conversion, photo‐induced energy barrier reduction, photo‐induced chemical effect, photo‐charging, and the synthesis of laser/photo‐assisted catalysts is provided. At the same time, the overpotential and Tafel slope of some catalysts mentioned above at 10 mA cm−2 is collected, and calculated the lifting efficiency of light on them, offering prospects for the development of each case.

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Electrocatalytic water oxidation of coral-like porous Zn-CoP nanohybrids synergistically inspired by photothermal and photoelectronic effects

Abstract: Electrocatalytic oxygen evolution reaction (OER) plays crucial role in the recycling of sustainable energy by coupling with some reduction reactions, but still suffers from sluggish kinetics and high overpotential. In...

Cited by 3 publications

References 71 publications

Experimental and Computational Insights into the Overall Water Splitting Reaction by the Fe–Co–Ni–P Electrocatalyst

Experimental and Computational Insights into the Overall Water Splitting Reaction by the Fe–Co–Ni–P Electrocatalyst

Built‐In Electric Field Boosted Overall Water Electrolysis at Large Current Density for the Heterogeneous Ir/CoMoO₄ Nanosheet Arrays

The Role of Photo in Oxygen Evolution Reaction: A Review

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Electrocatalytic water oxidation of coral-like porous Zn-CoP nanohybrids synergistically inspired by photothermal and photoelectronic effects

Abstract: Electrocatalytic oxygen evolution reaction (OER) plays crucial role in the recycling of sustainable energy by coupling with some reduction reactions, but still suffers from sluggish kinetics and high overpotential. In...

Cited by 3 publications

References 71 publications

Experimental and Computational Insights into the Overall Water Splitting Reaction by the Fe–Co–Ni–P Electrocatalyst

Experimental and Computational Insights into the Overall Water Splitting Reaction by the Fe–Co–Ni–P Electrocatalyst

Built‐In Electric Field Boosted Overall Water Electrolysis at Large Current Density for the Heterogeneous Ir/CoMoO4 Nanosheet Arrays

The Role of Photo in Oxygen Evolution Reaction: A Review

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Product

Resources

About

Built‐In Electric Field Boosted Overall Water Electrolysis at Large Current Density for the Heterogeneous Ir/CoMoO₄ Nanosheet Arrays