CAJ | 학술논문

以过渡金属羰基化合物和硒粉为原料,采用低温回流技术在1,6-己二醇中合成了W和Mo共掺杂的Ru-Mo-W-Se纳米簇合物。利用SEM、XRD和旋转圆盘电极( RDE)技术表征了合成催化剂的形貌、结构和电催化性能。催化剂以六方结构的Rux簇为主相,同时形成无定形相,聚集颗粒高度分散。在氧气饱和的0．5 mol·dm-3 H2 SO4溶液中,Ru-W-Mo-Se催化剂对氧还原反应( ORR)表现出较高的催化活性和稳定性,开路电位为0．90 V( vs． NHE),耐甲醇能力比Ru-Se明显增强。在Tafel电位范围内,催化剂的交换电流密度为4．98×10-4 mA·cm-2,具有较好的催化动力学性能。
이과도금속탄기화합물화서분위원료,채용저온회류기술재1,6-기이순중합성료W화Mo공참잡적Ru-Mo-W-Se납미족합물。이용SEM、XRD화선전원반전겁( RDE)기술표정료합성최화제적형모、결구화전최화성능。최화제이륙방결구적Rux족위주상,동시형성무정형상,취집과립고도분산。재양기포화적0．5 mol·dm-3 H2 SO4용액중,Ru-W-Mo-Se최화제대양환원반응( ORR)표현출교고적최화활성화은정성,개로전위위0．90 V( vs． NHE),내갑순능력비Ru-Se명현증강。재Tafel전위범위내,최화제적교환전류밀도위4．98×10-4 mA·cm-2,구유교호적최화동역학성능。
The Ru-W-Mo-Se nanometric cluster was synthesized by decarbonylation of transition metal carbonyl compounds in 1,6-hexanediol solvent containing dissolved selenium under refluxing conditions. The structure,morphology and electrocatalytic perform-ances of the as-prepared catalyst were characterized by SEM,XRD and rotating disk electrode( RDE) technique. The sample main-tained the hexagonal structure of Rux cluster as the main phase,formed an amorphous phase and presented a highly dispersed parti-cles. The catalyst demonstrated higher electrocatalytic activity, better stability and methanol tolerant than that of Ru-Se catalyst, showing an open circuit potential( OCP) of 0. 90 V( vs. NHE) in 0. 5 mol dm-3 H2 SO4 saturated with oxygen. The exchange current density was calculated to be 4. 98×10-4 mA cm-2 in Tafel potential region.