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Construction of Self-Supporting NiCoFe Nanotube Arrays Enabling High-Efficiency Alkaline Oxygen Evolution
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-12-01 , DOI: 10.1021/acsami.2c17112 Ruopeng Li 1 , Yaqiang Li 1 , Peixia Yang 1 , Penghui Ren 1 , Anmin Liu 2 , Shizheng Wen 3 , Jinqiu Zhang 1 , Maozhong An 1, 4
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-12-01 , DOI: 10.1021/acsami.2c17112 Ruopeng Li 1 , Yaqiang Li 1 , Peixia Yang 1 , Penghui Ren 1 , Anmin Liu 2 , Shizheng Wen 3 , Jinqiu Zhang 1 , Maozhong An 1, 4
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Enhancing the intrinsic activity and modulating the electrode–electrolyte interface microenvironment of nickel-based candidates are essential for breaking through the sluggish kinetics limitation of the oxygen evolution reaction (OER). Herein, a ternary nickel–cobalt–iron solid solution with delicate hollow nanoarrays architecture (labeled as NiCoFe-NTs) was designed and fabricated via a ZnO-templated electrodeposition strategy. Owing to the synergistic nanostructure and composition feature, NiCoFe-NT presents desirable alkaline OER performance, with a η10 and η500 of 187 and 310 mV, respectively, along with favorable long-term durability. In-depth analyses identify the heterogeneous nickel-based (oxy)hydroxide species derived from the oxidative reconstruction acting as an active contributor for oxygen evolution. Impressively, the regulatory mechanism of the catalytic performance by a rationally designed nanostructure was elucidated by compressive analyses; that is, the faster gas release processes induced by nanotube arrays can modulate the heterogeneous interface states during OER, which effectively facilitates the electrochemical charge–mass transfer to promote the reaction kinetics. To assess the practical feasibility, an alkaline water electrolyzer and a CO2 electrochemical reduction flow cell were constructed by coupling the anodic NiCoFe-NTs and cathodic nickel phosphides (Ni2P-NF) and metallic Cu electrocatalysts, respectively, both of which achieved high-efficiency operation.
中文翻译：
自支撑 NiCoFe 纳米管阵列的构建可实现高效碱性析氧
增强镍基候选材料的内在活性和调节电极-电解质界面微环境对于突破析氧反应 (OER) 的缓慢动力学限制至关重要。在此，通过 ZnO 模板电沉积策略设计并制造了具有精细空心纳米阵列结构（标记为 NiCoFe-NTs）的三元镍-钴-铁固溶体。由于协同的纳米结构和组成特征，NiCoFe-NT 呈现出理想的碱性 OER 性能，具有 η 10和 η 500分别为 187 和 310 mV，并具有良好的长期耐久性。深入分析确定了源自氧化重建的非均相镍基（氧）氢氧化物物种，作为氧气释放的积极贡献者。令人印象深刻的是，通过压缩分析阐明了合理设计的纳米结构对催化性能的调节机制；也就是说，由纳米管阵列引起的更快的气体释放过程可以调节 OER 过程中的异质界面状态，从而有效地促进电化学电荷-质量转移以促进反应动力学。为了评估实际可行性，碱性水电解槽和 CO 2通过耦合阳极NiCoFe-NTs和阴极磷化镍（Ni 2 P-NF）和金属Cu电催化剂分别构建了电化学还原流通池，两者均实现了高效运行。
更新日期：2022-12-01
中文翻译：
自支撑 NiCoFe 纳米管阵列的构建可实现高效碱性析氧
增强镍基候选材料的内在活性和调节电极-电解质界面微环境对于突破析氧反应 (OER) 的缓慢动力学限制至关重要。在此，通过 ZnO 模板电沉积策略设计并制造了具有精细空心纳米阵列结构（标记为 NiCoFe-NTs）的三元镍-钴-铁固溶体。由于协同的纳米结构和组成特征，NiCoFe-NT 呈现出理想的碱性 OER 性能，具有 η 10和 η 500分别为 187 和 310 mV，并具有良好的长期耐久性。深入分析确定了源自氧化重建的非均相镍基（氧）氢氧化物物种，作为氧气释放的积极贡献者。令人印象深刻的是，通过压缩分析阐明了合理设计的纳米结构对催化性能的调节机制；也就是说，由纳米管阵列引起的更快的气体释放过程可以调节 OER 过程中的异质界面状态，从而有效地促进电化学电荷-质量转移以促进反应动力学。为了评估实际可行性，碱性水电解槽和 CO 2通过耦合阳极NiCoFe-NTs和阴极磷化镍（Ni 2 P-NF）和金属Cu电催化剂分别构建了电化学还原流通池，两者均实现了高效运行。
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