Confining platinum clusters in ZIF-8-derived porous N-doped carbon arrays for high-performance hydrogen evolution reaction
Confining platinum clusters in ZIF-8-derived porous N-doped carbon arrays for high-performance hydrogen evolution reaction
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DOI：
10.1016/j.cej.2021.132259
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发表时间：
2021-09-17
影响因子：
15.1
通讯作者：
Zhang, Guanhua
中科院分区：
文献类型：
--
作者：
Chen, Xuefang;An, Xiuyun;Zhang, Guanhua
探索高效的析氢电催化剂对氢燃料的可持续和广泛应用具有重要意义。铂基电催化剂作为最突出的候选之一，由于其稀缺性、价格昂贵、稳定性差、耐用性差，限制了大规模的商业应用。在此，我们在连续导电的碳纳米管阵列衬底上构建了一个由zif -8衍生的氮掺杂碳阵列限制铂簇结构，命名为CTA@Pt@NCBs。正如预期的那样，制备的CTAs@Pt@ ncb在10 mA cm-2下具有27.42 mV的低过电位。更重要的是，CTA@Pt@ ncb表现出优异的稳定性和耐久性，在60小时的时间电位测试后，其电位保留率为97.18%，高于商用Pt/C(53.09%)，并且在10,000个电位循环后活性几乎没有下降。优异的电催化性能主要归功于其独特的结构特征，包括局限的铂簇、多孔的氮掺杂碳泡、连续导电的碳纳米管阵列和无粘结剂的电极。本研究为提高铂基催化剂的稳定性和原子利用效率，从而提高其成本效益提供了可行的策略。
Exploring high efficient electrocatalyst for hydrogen evolution reaction plays a vital role in the sustainable and widespread application of hydrogen fuel. Platinum-based electrocatalysts, as one of the most standout candidates, are limited to large-scale commercial applications attributing to their scarcity, expensive price, poor stability, and inferior durability. Herein, we construct a ZIF-8-derived nitrogen-doped carbon arrays-confined platinum clusters structure, named CTA@Pt@NCBs, on a continuously conducting carbon nanotube arrays substrate. As expected, the prepared CTAs@Pt@NCBs exhibits a low overpotential of 27.42 mV at 10 mA cm-2. More importantly, CTA@Pt@NCBs demonstrate excellent stability and durability, with 97.18% potential retention after 60 h of chronopotentiometric test, higher than that of commercial Pt/C (53.09%), and virtually no decrease in activity after 10, 000 potential cycles. The excellent electrocatalytic performance is mainly attributed to the unique structural features, including confined Pt clusters, porous nitrogen-doped carbon bubbles, continuous conductive carbon nanotube arrays, and binder-free electrode. This work provides a feasible strategy for improving the stability and atom utilization efficiency of platinum-based catalysts, thereby increasing their cost-effectiveness.