NiPS3 quantum sheets modified nitrogen-doped mesoporous carbon with boosted bifunctional oxygen electrocatalytic performance
NiPS3 quantum sheets modified nitrogen-doped mesoporous carbon with boosted bifunctional oxygen electrocatalytic performance
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NiPS3量子片改性氮掺杂介孔碳具有增强的双功能氧电催化性能
DOI：
10.1016/j.jmst.2020.04.065
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发表时间：
2021-02-01
影响因子：
10.9
通讯作者：
Wu, Hui
中科院分区：
文献类型：
--
作者：
Huang, Kai;Xu, Yuyang;Wu, Hui
氧还原反应(ORR)和析氧反应(OER)的电催化剂是燃料电池、金属-空气电池和水电解等储能和转换技术的关键和挑战。为了替代贵金属催化剂，提高碳基材料的催化性能，我们首次开发了镍、磷、硫、氮共修饰的介孔碳(NiPS3@NMC)作为双功能氧电催化剂。ORR(0.90V时的半波电位)和OER(1.48V时的10 mA cm(-2))的性能超过了铂/碳和IrO2复合催化剂以及相关文献报道的大多数非贵金属基双功能电催化剂。此外，电化学耐久性还通过加速耐久性试验(ADTS)和长期计时电流法(CA)试验得到证实。结果表明，NiPS3量子片(QSS)与NMC衬底之间的界面效应有助于提高氧电极的双功能，具有更多的活性中心，这是由于镍、磷和硫元素提供的电子和相对丰富的吡啶型N。这种优异的综合性能突出了NiPS3 QSS和NMC复合材料作为能量转换和存储材料的潜在应用。(C)由爱思唯尔有限公司代表《材料科学与技术杂志》编辑部出版的《2021》。
Electrocatalysts for oxygen reduction reactions (ORR) and oxygen evolution reactions (OER) are highly crucial and challenging toward the energy storage and conversion technologies such as fuel cells, metal-air batteries and water electrolysis. To replace noble-metal based catalysts and boost catalytic performance of carbon-based materials, we initially develop the nickel, phosphorus, sulfur and nitrogen co-modified mesoporous carbon (NiPS3@NMC) as a bifunctional oxygen electrocatalyst. The performance for ORR (half-wave potential at 0.90 V) and OER (10 mA cm(-2) at 1.48 V) surpasses those of Pt/C coupled with IrO2 catalysts and most of the non-precious metal based bifunctional electrocatalysts reported in related literature. Moreover, the electrochemical durability is also confirmed by accelerated durability tests (ADTs) and long-term chronoamperometry (CA) tests. We demonstrated that the interfacial effect between NiPS3 quantum sheets (QSs) and NMC substrates by thermal activation contributed to the enhanced oxygen electrode bifunctionality with more active sites, due to the electrons-donating from nickel, phosphorus and sulfur elements and relatively enriched pyridinic type N. Such excellent overall performance highlights the potential application of NiPS3 QSs and NMC composites as the materials on energy conversion and storage. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.