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Ti-Doped SnO2 Supports IrO2 Electrocatalysts for the Oxygen Evolution Reaction (OER) in PEM Water Electrolysis
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-01-06 , DOI: 10.1021/acssuschemeng.2c06368 Hanyang Li 1 , Yuexin Xu 1 , Ning Lv 1, 2 , Qiuyitong Zhang 1 , Xiaolian Zhang 1 , Zijie Wei 1 , Yadong Wang 1, 2 , Haolin Tang 1, 2 , Hongfei Pan 1, 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-01-06 , DOI: 10.1021/acssuschemeng.2c06368 Hanyang Li 1 , Yuexin Xu 1 , Ning Lv 1, 2 , Qiuyitong Zhang 1 , Xiaolian Zhang 1 , Zijie Wei 1 , Yadong Wang 1, 2 , Haolin Tang 1, 2 , Hongfei Pan 1, 2
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The development of polymer electrolyte membrane electrolysis of water is mainly limited by the high cost of noble metals and inadequate stability owing to the slow reaction kinetics of the oxygen evolution reaction and the restrictions of strongly acidic operating environments. To improve the utilization of noble metals, we use Ti-doped SnO2 as a carrier to support active species IrO2. The results show that the introduction of Ti element can inhibit the grain growth and help to improve the electrical conductivity of SnO2. Electrochemical tests for the catalysts show that 40 wt % IrO2/TSO has the best mass-normalized charge (231.24 C g–1 IrO2) and current density (714.85 A g–1 IrO2) at 1.6 V with the overpotential of only 271 mV at 10 mA cm–2, which is attributed to the outstanding dispersion effect of Ti-doped SnO2 and the synergy between the active species and the introduction of Ti element. The comprehensive advantages exhibited by the Ti-doped SnO2 support provide an alternative solution to reduce the cost of noble metal catalysts by improving the catalytic activity and stability.
中文翻译：
Ti 掺杂 SnO2 支持 IrO2 电催化剂用于 PEM 水电解中的析氧反应 (OER)
聚合物电解质膜电解水的发展主要受制于贵金属成本高、析氧反应动力学慢、稳定性不足以及强酸性操作环境的限制。为了提高贵金属的利用率，我们使用Ti掺杂的SnO 2作为载体负载活性物质IrO 2。结果表明，Ti元素的引入可以抑制晶粒长大，有助于提高SnO 2的电导率。催化剂的电化学测试表明，40 wt% IrO 2 /TSO 具有最佳的质量归一化电荷 (231.24 C g –1 IrO 2 ) 和电流密度 (714.85 A g–1 IrO 2 )在1.6 V时，在10 mA cm –2时的过电势仅为271 mV ，这归因于Ti掺杂SnO 2出色的分散效果以及活性物种与Ti元素引入之间的协同作用。Ti掺杂SnO 2载体所表现出的综合优势为通过提高催化活性和稳定性来降低贵金属催化剂的成本提供了一种替代解决方案。
更新日期：2023-01-06
中文翻译：
Ti 掺杂 SnO2 支持 IrO2 电催化剂用于 PEM 水电解中的析氧反应 (OER)
聚合物电解质膜电解水的发展主要受制于贵金属成本高、析氧反应动力学慢、稳定性不足以及强酸性操作环境的限制。为了提高贵金属的利用率，我们使用Ti掺杂的SnO 2作为载体负载活性物质IrO 2。结果表明，Ti元素的引入可以抑制晶粒长大，有助于提高SnO 2的电导率。催化剂的电化学测试表明，40 wt% IrO 2 /TSO 具有最佳的质量归一化电荷 (231.24 C g –1 IrO 2 ) 和电流密度 (714.85 A g–1 IrO 2 )在1.6 V时，在10 mA cm –2时的过电势仅为271 mV ，这归因于Ti掺杂SnO 2出色的分散效果以及活性物种与Ti元素引入之间的协同作用。Ti掺杂SnO 2载体所表现出的综合优势为通过提高催化活性和稳定性来降低贵金属催化剂的成本提供了一种替代解决方案。
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