CAJ | 학술논문

采用改进的多元醇法制备了 PtNi(原子比1：1)质量分数为60%的高金属载量碳载 PtNi 合金(PtNi/C)，通过在450℃下退火处理获得了碳载 PtNi 金属间化合物氧还原电催化剂.该催化剂对氧还原的质量比活性和面积比活性分别是商业化 Pt/ C(JM Pt/ C)催化剂的1.66和2.3倍；并且加速耐久性测试后 PtNi 金属间化合物催化剂的质量比活性仍与 Pt/ C 的初始性能相当，耐久性得到了大幅提升. PtNi/ C 金属间化合物催化剂氧还原活性和稳定性的提高归因于 PtNi 的有序原子排布结构及催化剂表面零价金属含量的提高.
채용개진적다원순법제비료 PtNi(원자비1：1)질량분수위60%적고금속재량탄재 PtNi 합금(PtNi/C)，통과재450℃하퇴화처리획득료탄재 PtNi 금속간화합물양환원전최화제.해최화제대양환원적질량비활성화면적비활성분별시상업화 Pt/ C(JM Pt/ C)최화제적1.66화2.3배；병차가속내구성측시후 PtNi 금속간화합물최화제적질량비활성잉여 Pt/ C 적초시성능상당，내구성득도료대폭제승. PtNi/ C 금속간화합물최화제양환원활성화은정성적제고귀인우 PtNi 적유서원자배포결구급최화제표면령개금속함량적제고.
PtNi/ C disordered alloy nanoparticles, synthesized in ethylene glycol solution, were annealed and converted into ordered PtNi/ C intermetallic nanoparticles. Such an ordered intermetallic PtNi/ C catalyst showed enhanced specific activity and mass activity, which were about 2. 3 and 1. 66 times those of Pt/ C for the oxygen reduction reaction( ORR), in comparison with the Pt/ C catalyst. After accelerated stress tests (ASTs), the ORR mass activity of the Pt/ C and PtNi/ C intermetallic nanoparticles decreased to 88. 92% and 36. 95% of the initial values, respectively; and the mass activity of PtNi/ C intermetallic nanoparticles after ASTs was equivalent to the initial one of the Pt/ C catalyst. The enhanced ORR activity and durability of the PtNi/ C intermetallic nanoparticles could be attributed to the ordered atomic configuration and the increased content of zero valence metal on the surface of nanoparticles. Moreover, the ordered PtNi/ C intermetallic nanoparticles exhibited higher methanol tolerance during the ORR than the Pt/ C catalyst.