One-step efficiently coupling ultrafine Pt-Ni2P nanoparticles as robust catalysts for methanol and ethanol electro-oxidation in fuel cells reaction
One-step efficiently coupling ultrafine Pt-Ni2P nanoparticles as robust catalysts for methanol and ethanol electro-oxidation in fuel cells reaction
复制标题
一步有效耦合超细 Pt-Ni2P 纳米粒子作为燃料电池反应中甲醇和乙醇电氧化的稳健催化剂
DOI：
10.1016/j.jpowsour.2019.226754
复制
发表时间：
2019
影响因子：
9.2
通讯作者：
Feng Ligang
中科院分区：
文献类型：
--
作者：
Liu Hui;Yang Dawen;Bao Yufei;Yu Xu;Feng Ligang
燃料电池催化剂体系中多组分有效的相互作用对催化剂性能的最大化具有重要意义。在此，我们证明了纳米结构的Pt-Ni 2 P-石墨烯杂化材料的成功制造，通过一个简单的一步方法和他们的积极和稳定的性能，醇类氧化燃料电池反应。光谱分析表明，Pt和Ni 2 P纳米粒子形成了晶格常数略有降低的杂化晶体结构，Pt 4f谱出现较大负移，表明Pt和Ni 2 P纳米粒子之间存在密切的相互作用。体系中Ni 2 P含量越多，催化活性越低; 20% Pt-Ni 2 P-Graphene具有最好的抗CO中毒能力和醇类燃料电氧化性能。具体地，对于甲醇氧化，质量活性和比活性比Pt/石墨烯催化剂高约3倍和2倍，对于乙醇氧化，质量活性和比活性比Pt/石墨烯催化剂高约2.7倍和1.8倍。一步水热法制备的Pt/Ni 2 P杂化材料具有高的抗中毒能力和大的电化学活性表面积，是其高催化活性、快速动力学和优异催化稳定性的主要原因。这种制备方法也可以推广到其他类似的燃料电池催化剂体系。
Multi-components valid interaction is significant to maximize the catalyst performance in fuel cells catalyst system. Herein, we demonstrate the successful fabrication of nano-structured Pt–Ni2P-Graphene hybrid by a simple one-step approach and their active and stable performance for alcohols oxidation in fuel cells reaction. The hybrid crystal structure formation with a slightly reduced lattice parameter and a close interaction for Pt and Ni2P nanoparticles are demonstrated by spectrum analysis; a strong electronic effect is found by a large negative shift of Pt 4f spectrum. The more and the less of Ni2P in the system gives lower catalytic ability; 20% Pt–Ni2P-Graphene demonstrates the best CO anti-poisoning ability and alcohols fuel electro-oxidation performance. Specifically, the mass activity and specific activity are about 3 and 2 times higher than that of Pt/Graphene catalyst for methanol oxidation, and about 2.7 and 1.8 times improvement for ethanol oxidation. The high catalytic activity, rapid kinetics and excellent catalytic stability can be attributed to the Pt and Ni2P hybridization formed in the one-step hydrothermal approach that imparts them high anti-poisoning ability and large electrochemical active surface area. This fabrication approach can also be extended to other analogues catalyst system for fuel cells catalysis.