Interface cooperative Pt-CoNi LDH for urea-assisted energy-saving hydrogen production under ampere-level current density

IF 16.7 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2026-03-01 Epub Date: 2026-01-15 DOI:10.1016/j.nanoen.2026.111728

Huilin Zhao , Xiaojun Wang , Fengyuan Tian , Weiping Xiao , Junwu Liang , Wenli Yu , Tianyi Ma , Lei Wang , Zexing Wu

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引用次数: 0

Abstract

Engineering bifunctional electrocatalysts featuring promoted adsorption for multiple intermediates and reactants via interface modulation strategies is critical for urea-assisted water splitting toward sustainable energy conversion. However, exploring efficient bifunctional electrocatalysts capable of driving both the hydrogen evolution reaction (HER) and urea oxidation reaction (UOR) at high current densities remains challenging. Herein, a self-supported bifunctional electrode is constructed on nickel foam, where the cooperative CoNi LDH is decorated with low-content Pt nanospheres (Pt-CoNi LDH/NF) for urea-assisted H₂ production. The strong metal-support interaction (SMSI) and multi-metal synergy collectively regulate the adsorption/desorption behavior of key reaction species, thereby lowering the energy barrier for the rate-determining step and improving overall catalytic efficiency. The optimized catalyst exhibits substantially reduced potentials of 1.32 V (UOR) and −30 mV (HER) to reach 10 mA cm⁻². A urea-assisted electrolytic cell merely requires 1.36 V to afford 10 mA cm⁻². Notably, in a practical anion-exchange membrane (AEM) electrolyzer configuration, the Pt-CoNi LDH/NF electrode maintains stable at 2 A cm⁻², while preserving high UOR/HER bifunctional activity. This study develops an integrated approach that couples urea-containing wastewater remediation with energy-efficient hydrogen production.

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在安培级电流密度下，界面协同Pt-CoNi LDH用于尿素辅助节能制氢

通过界面调节策略促进多种中间体和反应物吸附的工程双功能电催化剂是实现尿素助水分解可持续能量转化的关键。然而，探索能够在高电流密度下同时驱动析氢反应（HER）和尿素氧化反应（UOR）的高效双功能电催化剂仍然具有挑战性。本文在泡沫镍上构建了一种自支撑双功能电极，其中协同的CoNi LDH表面装饰有低含量的Pt纳米球（Pt-CoNi LDH/NF），用于尿素辅助制氢。强金属-载体相互作用（SMSI）和多金属协同作用共同调节了关键反应物质的吸附/解吸行为，从而降低了决定速率步骤的能垒，提高了整体催化效率。优化后的催化剂电势大幅降低，分别为1.32 V （UOR）和- 30 mV (HER)，达到10 mA cm−2。一个尿素辅助的电解电池只需要1.36 V来提供10 mA cm−2。值得注意的是，在实际的阴离子交换膜（AEM）电解槽配置中，Pt-CoNi LDH/NF电极在2 a cm−2下保持稳定，同时保持高UOR/HER双功能活性。本研究开发了一种将含尿素废水修复与节能制氢相结合的综合方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.