School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, PR China; State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, PR China.
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, PR China.
J Colloid Interface Sci. 2019 Feb 1;535:392-399. doi: 10.1016/j.jcis.2018.10.003. Epub 2018 Oct 4.
Fuel cells hold great potential of replacing traditional fossil fuel to alleviate the energy crisis and increasing environmental concerns. Although great progresses have been achieved over decades, the sluggish reaction kinetics and poor durability of electrocatalysts in fuel cells have been the decisive bottleneck that limited their practical applications. Herein, we focus on the design and development of cost-efficient anode electrocatalysts for fuel cells and report the successful creation of an advanced class of N-doped graphene (NG) supported binary PdAg nanocapsules (PdAg NCPs). The well-defined nanocatalysts with highly open structure exhibit greatly improved electrocatalytic performances for ethylene glycol oxidation reaction (EGOR). In particular, the optimized PdAg NCPs/NG show the mass and specific activities of 6118.3 mA mg and 13.8 mA cm, which are 5.8 and 6.9 times larger than those of the commercial Pd/C catalysts, respectively. More importantly, such PdAg NCPs/NG can also maintain at least 500 potential cycles with limited catalytic activity attenuation, showing an advanced class of electrocatalysts for fuel cells.
燃料电池在替代传统化石燃料以缓解能源危机和减少环境问题方面具有巨大的潜力。尽管几十年来已经取得了重大进展，但燃料电池中电催化剂的缓慢反应动力学和较差的耐久性一直是限制其实际应用的决定性瓶颈。在此，我们专注于设计和开发用于燃料电池的具有成本效益的阳极电催化剂，并报告了一类先进的氮掺杂石墨烯（NG）负载二元 PdAg 纳米胶囊（PdAg NCPs）的成功合成。具有高度开放结构的这种纳米催化剂表现出对乙二醇氧化反应（EGOR）极大改善的电催化性能。特别是，优化后的 PdAg NCPs/NG 的质量和比活性分别达到 6118.3 mA mg 和 13.8 mA cm，分别是商业 Pd/C 催化剂的 5.8 倍和 6.9 倍。更重要的是，这种 PdAg NCPs/NG 在至少 500 个电位循环中仍能保持有限的催化活性衰减，显示出一类先进的燃料电池电催化剂。
