He Gege, Tian Liangliang, Cai Yanhua, Wu Shenping, Su Yongyao, Yan Hengqing, Pu Wanrong, Zhang Jinkun, Li Lu
Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing, People's Republic of China.
Co-innovation Center for Micro/Nano Optoelectronic Materials and Devices, Chongqing, People's Republic of China.
Nanoscale Res Lett. 2018 Jan 9;13(1):3. doi: 10.1186/s11671-017-2406-0.
Transition metal oxides (TMOs) have attracted extensive research attentions as promising electrocatalytic materials. Despite low cost and high stability, the electrocatalytic activity of TMOs still cannot satisfy the requirements of applications. Inspired by kinetics, the design of hollow porous structure is considered as a promising strategy to achieve superior electrocatalytic performance. In this work, cubic NiO hollow porous architecture (NiO HPA) was constructed through coordinating etching and precipitating (CEP) principle followed by post calcination. Being employed to detect glucose, NiO HPA electrode exhibits outstanding electrocatalytic activity in terms of high sensitivity (1323 μA mM cm) and low detection limit (0.32 μM). The excellent electrocatalytic activity can be ascribed to large specific surface area (SSA), ordered diffusion channels, and accelerated electron transfer rate derived from the unique hollow porous features. The results demonstrate that the NiO HPA could have practical applications in the design of nonenzymatic glucose sensors. The construction of hollow porous architecture provides an effective nanoengineering strategy for high-performance electrocatalysts.
过渡金属氧化物（TMOs）作为一种有前景的电催化材料，已引起广泛的研究关注。尽管TMOs成本低且稳定性高，但其电催化活性仍不能满足应用需求。受动力学启发，空心多孔结构的设计被认为是实现优异电催化性能的一种有前景的策略。在这项工作中，通过配位蚀刻和沉淀（CEP）原理并随后进行后煅烧，构建了立方NiO空心多孔结构（NiO HPA）。用于检测葡萄糖时，NiO HPA电极在高灵敏度（1323 μA mM cm）和低检测限（0.32 μM）方面表现出出色的电催化活性。优异的电催化活性可归因于大比表面积（SSA）、有序的扩散通道以及源自独特空心多孔特征的加速电子转移速率。结果表明，NiO HPA在非酶葡萄糖传感器的设计中可能具有实际应用。空心多孔结构的构建为高性能电催化剂提供了一种有效的纳米工程策略。
