Porous Pd/NiFeO<sub>x</sub> Nanosheets Enhance the pH‐Universal Overall Water Splitting

Zhang, Wen; Jiang, Xue; Dong, Zemeng; Wang, Jing; Zhang, Ning; Liu, Jie; Guang, Xu; Wang, Lei

doi:10.1002/adfm.202107181

Cited by 71 publications

(47 citation statements)

References 80 publications

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“…This is in agreement with previous studies that indicate that the utilization of urea and NH 4 F in the hydrothermal procedure can produce flower-like microsphere structure due to thermodynamic preferences. [32,33] Much more detailed experimental and theoretical studies are needed to elucidate the exact formation mechanism of flower-like microsphere structure. X-ray photoelectron spectroscopy (XPS) results reveal that the Co and Mo elements are in the oxidized state (Figure S2, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Interface Engineering of Co/CoMoN/NF Heterostructures for High‐Performance Electrochemical Overall Water Splitting

et al. 2022

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The development of low‐cost and high‐efficiency catalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline electrolyte is still challenging. Herein, interfacial Co/CoMoN heterostructures supported on Ni foam (Co/CoMoN/NF) are constructed by thermal ammonolysis of CoMoOx. In 1.0 m KOH solution, Co/CoMoN/NF heterostructures exhibit excellent HER activity with an overpotential of 173 mV at 100 mA cm−2 and a Tafel slope of 68.9 mV dec−1. Density functional theory calculations indicate that the low valence state Co site acts as efficient water‐dissociation promoter, while CoMoN substrate has favorable hydrogen adsorption energy, leading to an enhanced HER activity. The Co/CoMoN/NF heterostructures also achieve high OER activity with an overpotential of 303 mV at 100 mA cm−2 and a Tafel slope of 56 mV dec−1. Using Co/CoMoN/NF heterostructures as the cathode and anode, the alkaline electrolyzer requires a low voltage of 1.56 V to reach the current density of 100 mA cm−2 along with superior long‐term durability. This study provides a new design strategy toward low‐cost and excellent catalysts for water splitting.

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Section: Resultsmentioning

confidence: 99%

Interface Engineering of Co/CoMoN/NF Heterostructures for High‐Performance Electrochemical Overall Water Splitting

et al. 2022

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Section: Catalysts For Overall Water Splittingmentioning

confidence: 99%

Surface Design Strategy of Catalysts for Water Electrolysis

Zhou

Gao

Zou

et al. 2022

Small

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consumption leads to a range of environmental problems such as air pollution, thermal pollution, global warming, and resource shortage. [1,2] Therefore, the development of clean, renewable, and new energy that can replace traditional fossil fuels is the top priority of energy development. [3] Hydrogen energy is the most promising clean energy, with high combustion calorific value (4.5 times coke). [4] Hydrogen produces water when converting chemical energy, contributing to recycling resources. [5] There are three kinds of techniques for hydrogen production: photocatalysis, water electrolysis, and biomass reforming. Global generate electricity by using renewable energy such as wind, water, and solar energy, but the storage problem of electricity leads to incomplete utilization of electricity. [6][7][8] Water electrolysis only needs renewable electric power to drive the reaction, and it has attracted wide attention due to pollution-free and low cost. [9] As a result, water electrolysis has very broad prospects in solving energy and environmental problems.Water electrolysis technology gets hydrogen by converting electrical energy into chemical energy, oxygen is obtained on the anode via the oxygen evolution reaction (OER), and hydrogen is obtained on the cathode via the hydrogen evolution reaction (HER). [10] As commercial electrocatalysts on the anode side of electrolyzer, Ir-based catalysts can not only survive under high corrosion conditions but also show efficient catalytic performance. Noble metal materials (Ir-based OER catalysts and Pt-based HER catalysts) are the best catalysts, but the high price and rare reserves limit their long-term commercial applications. [11,12] Therefore, catalysts with high activity and low cost are the ongoing research targets. The exposure of OER catalysts to highly corrosive and oxidative conditions cause severe inactivation and instability, which is one of bottlenecks for largescale application of water electrolysis. The most stable catalyst is the corroded Fe foam, which maintains a current density of 1000 mA cm −2 at 5000 h. [13] Co 3 O 4 @CoO can maintain a steady current of >1000 h without showing significant decay. [14] However, the short-term stability of some catalysts does not meet the requirements of practical applications.This review presents the recent progress of OER and HER catalysts. Through a summary of the reaction mechanisms of OER and HER, it is clear about the specific steps in the occurrence of OER and HER. The rate-determining steps of OER and HER can indicate a specific direction for the design of the catalysts. And then focus on the recent progress on surface design of various OER and HER catalysts and find that the catalyst surface regulation plays an important role in the catalyst design.Hydrogen, a new energy carrier that can replace traditional fossil fuels, is seen as one of the most promising clean energy sources. The use of renewable electricity to drive hydrogen production has very broad prospects for addressing energy and environmental problems. T...

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“…169/180/310 -/80@50@-/--- [111] N-Pd/A-Co (II) 1 M KOH 58 -10@30@-- [112] 1%Pd-MoS 2 /CP 0.5 M H 2 SO 4 89 -10@100@-5000@-[31] strategy to improve the materials' physicochemical properties and enhance the catalytic activity and stability further. Wang group grew peony-like Pd/NiFeO x on NF with tightly arranged petals and uniform mesoporous structure (Figure 7G-J).…”

Section: Palladium-basedmentioning

confidence: 99%

Section: Recent Progressmentioning

confidence: 99%

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

Zhai

Chen

et al. 2022

InfoMat

111

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Developing new methodologies to produce clean and renewable energy resources is pivotal for carbon‐neutral initiatives. Hydrogen (H2) is considered as an ideal energy resource due to its nontoxic, pollution‐free, high utilization rate, and high calorific combustion value. Electrolysis of water driven by the electricity generated from renewable and clean energy sources (e.g., solar energy, wind energy) to produce hydrogen attracts great efforts for hydrogen production with high purity. Recently, the breakthrough of the catalyst activity limit for the hydrogen evolution reaction (HER) catalysts has received extensive attention. Comparatively, fewer reviews have focused on the long‐term stability of HER catalysts, which is indeed decisive for large‐scale electrolytic industrialization. Therefore, a systematic summary concentrated on the durability of HER electrocatalysts would provide a fundamental understanding of the electrocatalytic performance for practical applications and offer new opportunities for the rational design of the highly performed HER electrocatalysts. This review summarizes the research progress toward the HER stability of precious metals, transition metals, and metal‐free electrocatalysts in the past few years. It discusses the challenges in the stability of HER electrocatalysts and the future perspectives. We anticipate that it would provide a valuable basis for designing robust HER electrocatalysts.

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Porous Pd/NiFeO_x Nanosheets Enhance the pH‐Universal Overall Water Splitting

Cited by 71 publications

References 80 publications

Interface Engineering of Co/CoMoN/NF Heterostructures for High‐Performance Electrochemical Overall Water Splitting

Interface Engineering of Co/CoMoN/NF Heterostructures for High‐Performance Electrochemical Overall Water Splitting

Surface Design Strategy of Catalysts for Water Electrolysis

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

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Porous Pd/NiFeOx Nanosheets Enhance the pH‐Universal Overall Water Splitting

Cited by 71 publications

References 80 publications

Interface Engineering of Co/CoMoN/NF Heterostructures for High‐Performance Electrochemical Overall Water Splitting

Interface Engineering of Co/CoMoN/NF Heterostructures for High‐Performance Electrochemical Overall Water Splitting

Surface Design Strategy of Catalysts for Water Electrolysis

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

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Porous Pd/NiFeO_x Nanosheets Enhance the pH‐Universal Overall Water Splitting