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| 1 | 脱合金时间对纳米多孔泡沫Pd电催化氧化甲醇性能的影响显示文摘为提高燃料电池的阳极催化剂Pd的催化活性,降低其成本,以Al_(85)Pd_(15)合金薄带为前驱体,通过简单的脱合金法制备了自支撑精细三维纳米多孔泡沫Pd(NPF-Pd)催化剂。该催化剂在显著提高Pd利用率的前提下,凭借结构优势,使其电催化氧化甲醇性能较商用5%Pt/C催化剂有显著提升。其中,90℃脱合金腐蚀3 h得到的NPF-Pd-2催化剂催化性能最佳,其贵金属质量比活性、稳定性和性价比约为商用5%Pt/C催化剂(阿拉丁P111328~25 g包装)的1.7、2.4和7.1倍。该催化剂的设计研究可为高效Pd催化剂的商业化应用提供一种可行的途径。 | 宋衍滟 陈盈 陈晓东 周小伟 贺辛亥 苏晓磊 何丽忠 | 2021 | 纺织高校基础科学学报2021，34，3： | 3 |
| 2 | Low-coordinated surface sites make truncated Pd tetrahedrons as robust ORR electrocatalysts outperforming Pt for DMFC devices显示文摘Developing highly stable and active non-Pt oxygen reduction reaction(ORR)electrocatalysts for power generation device raises great concerns and remains a challenge.Here,we report novel truncated Pd tetrahedrons(T-Pd-Ths)enclosed by{111}facets with excellent uniformity,which have both low-coordinated surface sites and distinct lattice distortions that would induce“local strain”.In alkaline electrolyte,the T-Pd-Ths/C achieves remarkable ORR specific/mass activity(SA/MA)of 2.46 mA·cm^(−2)/1.69 A·mgPd^(−1),which is 12.3/16.9 and 10.7/14.1 times higher than commercial Pd/C and Pt/C,respectively.The T-Pd-Ths/C also exhibits high in-situ carbon monoxide(CO)tolerance and 50,000 cycles durability with an activity loss of 7.69%and morphological stability.The rotating ring-disk electrode(RRDE)measurements show that a 4-electron process occurs on T-PdThs/C.Theoretical calculations demonstrate that the low-coordinated surface sites contribute largely to the enhancement of ORR activity.In actual direct methanol fuel cell(DMFC)device,the T-Pd-Ths/C delivers superior open-circuit voltage(OCV)and peak power density(PPD)to commercial Pt/C from 25 to 80℃,and the maximum PPD can reach up to 163.7 mW·cm−2.This study demonstrates that the T-Pd-Ths/C holds promise as alternatives to Pt for ORR in DMFC device. | Xiaoling Wang Jingwei Li Xiaotong Yang Fengling Zhao Yongfei Li Daliang Zhang Li-Yong Gan Ke Xin Yao Qiang Yuan | 2022 | Nano Research2022，15，9： | 1 |
| 3 | Ir和IrPd催化剂的合成及结构调控对其甲醇氧化性能的影响显示文摘以三嵌段共聚物P123(聚环氧乙烷-聚环氧丙烷-聚环氧乙烷,PEO_(20)-PPO_(70)-PEO_(20))为还原剂和保护剂,比较了水热法和溶剂热法对纯Ir和IrPd合金催化剂合成及其电催化氧化甲醇(MOR)性能的影响。对于纯Ir催化剂,在相同条件下,溶剂热法能更好地促进Ir前驱体的还原。对于IrPd合金催化剂,溶剂热法可制得表面富含Ir但MOR活性较低的核壳结构产物(IrPd-S)。水热反应得到的不同原子比(IrPd、Ir2Pd、IrPd_(2))的产物粒径更小,元素分布更均匀。其中比例为1:1的IrPd(IrPd-H)催化剂的MOR电催化活性最高。上述结果表明,通过调节溶剂类型以及P123的结构诱导作用,可以有效地调节纯Ir和IrPd合金催化剂的结构、表面组成和电催化活性。 | 周新文 沈晓宇 付策 王攀 严烙意 程征 田贵贤 张荣华 | 2024 | 无机化学学报2024，40，2： | 0 |
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