Defect-Engineered NiCo Hydroxide Nanostructures for Highly Efficient Electrocatalytic Glucose Oxidation to Formic Acid

IF 9.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materials Chemistry A Pub Date : 2025-09-25 DOI:10.1039/d5ta05263g

Yaqiu Wang, Bin Li, Ming Tian, Jing Ma, Li Guo, Ming Xu, Tingting Cui

{"title":"Defect-Engineered NiCo Hydroxide Nanostructures for Highly Efficient Electrocatalytic Glucose Oxidation to Formic Acid","authors":"Yaqiu Wang, Bin Li, Ming Tian, Jing Ma, Li Guo, Ming Xu, Tingting Cui","doi":"10.1039/d5ta05263g","DOIUrl":null,"url":null,"abstract":"Coupling electrocatalytic hydrogen production with glucose oxidation to value-added oxygenates enables energy-efficient and cost-effective hydrogen generation with enhanced practicality. However, rationally regulating the surface defect structure of electrocatalyst to improve the catalytic performance still remains a great challenge. Herein, we design a NiCo layered double hydroxide (D-NiCo(OH)x) catalyst with abundant oxygen vacancies (VO) and metal vacancies (VM) through a one-step hydrothermal method coupled with an alkaline treatment strategy. The as-synthesized D-NiCo(OH)x catalyst exhibits excellent glucose oxidation reaction (GOR) performances, achieving a current density of 200 mA cm-2 at 1.33 V (vs. RHE) with a formic acid (FA) Faradaic efficiency (FE) of 92% at 1.36 V (vs. RHE), which is much higher than that of NiCo-LDH without defects (denoted as NiCo(OH)x) and superior to most previously reported non-noble metal electrocatalysts. Systematic studies reveal that dual vacancies enhance substrate adsorption while VO promotes C-C bond cleavage, collectively optimizing reaction kinetics and accounting for the excellent catalytic performance. This work provides new insights into the synergy of dual vacancies for enhancing substrate adsorption and accelerating C-C bond cleavage, advancing its application in biomass valorization and hydrogen production.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"2 1","pages":""},"PeriodicalIF":9.5000,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d5ta05263g","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Coupling electrocatalytic hydrogen production with glucose oxidation to value-added oxygenates enables energy-efficient and cost-effective hydrogen generation with enhanced practicality. However, rationally regulating the surface defect structure of electrocatalyst to improve the catalytic performance still remains a great challenge. Herein, we design a NiCo layered double hydroxide (D-NiCo(OH)_x) catalyst with abundant oxygen vacancies (V_O) and metal vacancies (V_M) through a one-step hydrothermal method coupled with an alkaline treatment strategy. The as-synthesized D-NiCo(OH)_x catalyst exhibits excellent glucose oxidation reaction (GOR) performances, achieving a current density of 200 mA cm^-2 at 1.33 V (vs. RHE) with a formic acid (FA) Faradaic efficiency (FE) of 92% at 1.36 V (vs. RHE), which is much higher than that of NiCo-LDH without defects (denoted as NiCo(OH)_x) and superior to most previously reported non-noble metal electrocatalysts. Systematic studies reveal that dual vacancies enhance substrate adsorption while V_O promotes C-C bond cleavage, collectively optimizing reaction kinetics and accounting for the excellent catalytic performance. This work provides new insights into the synergy of dual vacancies for enhancing substrate adsorption and accelerating C-C bond cleavage, advancing its application in biomass valorization and hydrogen production.

查看原文本刊更多论文

用于高效电催化葡萄糖氧化制甲酸的缺陷工程羟基氧化镍纳米结构

将电催化制氢与葡萄糖氧化结合到增值氧合物中，可以实现高效节能和具有成本效益的制氢，并增强实用性。然而，合理调节电催化剂的表面缺陷结构以提高催化性能仍然是一个巨大的挑战。在此，我们通过一步水热法结合碱性处理策略，设计了具有丰富氧空位（VO）和金属空位（VM）的NiCo层状双氢氧化物（D-NiCo(OH)x）催化剂。合成的D-NiCo(OH)x催化剂表现出优异的葡萄糖氧化反应（GOR）性能，在1.33 V（相对于RHE）下电流密度为200 mA cm-2，在1.36 V（相对于RHE）下甲酸（FA）法拉第效率（FE）为92%，远高于无缺陷的NiCo- ldh（表示为NiCo(OH)x），优于之前报道的大多数非贵金属电催化剂。系统研究表明，双空位增强了底物吸附，而VO促进了C-C键的裂解，共同优化了反应动力学，并解释了优异的催化性能。这项工作为双空位协同作用增强底物吸附和加速C-C键裂解提供了新的见解，推进了其在生物质增值和制氢方面的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

19.50

自引率

5.00%

发文量

1892

审稿时长

1.5 months

期刊介绍： The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.