Hybrid niobium and titanium nitride nanotube arrays implanted with nanosized amorphous rhenium-nickel: An advanced catalyst electrode for hydrogen evolution reactions
Hybrid niobium and titanium nitride nanotube arrays implanted with nanosized amorphous rhenium-nickel: An advanced catalyst electrode for hydrogen evolution reactions
复制标题
植入纳米非晶态铼镍的混合铌和氮化钛纳米管阵列：用于析氢反应的先进催化剂电极
DOI：
10.1016/j.ijhydene.2019.12.173
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发表时间：
2020
影响因子：
7.2
通讯作者：
Zheng Guoqu
中科院分区：
文献类型：
--
作者：
Zhang Huibin;Chen Xuanhan;Lin Zhimao;Zhang Liqiang;Cao Huazhen;Yu Linping;Zheng Guoqu
具有精细纳米结构的高性能析氢反应（HER）电催化剂的规模化应用取决于耐用和活性电极载体的开发。过渡金属氮化物由于其高导电性、良好的催化活性以及在酸性或碱性水溶液中优异的化学稳定性而被认为是候选物。采用阳极氧化-氮化工艺在铌钛合金表面制备了自有序的混合氮化铌钛纳米管阵列。结果表明，纳米氮化铌是由Nb 4 N5和TiN的混合物组成，具有超亲水性、优异的耐腐蚀性和高导电性。在成功合成Nb-Ti NNA的基础上，将纳米非晶态稀土镍（Re-Ni）合金电沉积到NNA载体上，制备了Re-Ni/NNA复合电极。电化学测试表明，在-0.18 V vs. RHE下，Re-Ni/NNA复合电极在1.0 M KOH中可提供50 mA cm-2的电流密度，并在100 h的测试周期内保持稳定。这种上级的HER性能归因于Re-Ni颗粒和Nb-Ti NNA载体的结合，这有利于降低电荷转移阻力和提高催化活性。
The scalable application of high-performance electrocatalysts with fine nanostructures for hydrogen evolution reactions (HER) depends on the development of durable and active electrode supports. Transition metal nitrides are considered as candidates due to their high conductivity, favorable catalytic activity, and excellent chemical stability in acidic or alkaline aqueous solutions. The present work proposed to fabricate self-ordered hybrid niobium–titanium (Nb–Ti) nitride nanotube arrays (NNAs) on Nb–Ti alloy panels by an anodization and subsequent nitridation process. Results showed that the highly ordered NNA is composed of mixed Nb4N5and TiN and has merits of super hydrophilicity, outstanding corrosion resistance, and high conductivity. On the basis of the successful synthesis of Nb–Ti NNA, the nano–sized amorphous rhenium–nickel (Re–Ni) alloy was electrodeposited onto the NNA support, forming the Re–Ni/NNA composite electrode. Electrochemical tests exhibited that the Re–Ni/NNA composite electrode can provide a current density of 50 mA cm−2in 1.0 M KOH at a potential of −0.18 V vs. RHE and maintain stability in a testing period of 100 h. This superior HER performance is attributed to the combination of Re–Ni particles and Nb–Ti NNA support, which can benefit the diminution of charge transfer resistance and the improvement of catalytic activity.