Polyvinylpyrrolidone stabilized-Ru nanoclusters loaded onto reduced graphene oxide as high active catalyst for hydrogen evolution
Polyvinylpyrrolidone stabilized-Ru nanoclusters loaded onto reduced graphene oxide as high active catalyst for hydrogen evolution
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聚乙烯吡咯烷酮稳定的钌纳米团簇负载在还原氧化石墨烯上作为析氢高活性催化剂
DOI：
10.1007/s11051-017-3924-5
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发表时间：
2017-06
影响因子：
2.5
通讯作者：
Liu Zhongyi
中科院分区：
文献类型：
--
作者：
Zhang Jiao;Hao Jinghao;Ma Qianli;Li Chuanqi;Liu Yushan;Li Baojun;Liu Zhongyi
采用静电自组装方法制备了Ru/还原氧化石墨烯纳米复合材料(Ru/rGO NCS)。通过强静电作用将聚乙烯吡咯烷酮(PVP)稳定并带正电的金属Ru纳米团簇均匀地负载到带负电的氧化石墨烯(GO)片上，得到了约1.2 nm的金属Ru纳米团簇。所制备的Ru/rGO纳米碳管对硼氢化钠(NaBH4)催化水解制氢具有较好的催化性能。在318K下，氢气生成速率为14.87 L H2min−1g CAT−1，较低的反应活化能为38.12kJ−1。动力学研究证实，NaBH4的水解反应对催化剂浓度为一级反应。在室温下反应5次后，NaBH4转化率保持在97%，催化活性保持在70%以上。这些结果表明，Ru/rGO纳米碳管在清洁能源领域具有广阔的应用前景。
Ruthenium/reduced graphene oxide nanocomposites (Ru/rGO NCs) were synthesized via an electrostatic self-assembly approach. Polyvinylpyrrolidone (PVP) stabilized and positively charged metallic ruthenium nanoclusters about 1.2 nm were synthesized and uniformly loaded onto negatively charged graphene oxide (GO) sheets via strong electrostatic interactions. The as-prepared Ru/rGO NCs exhibited superior performance in catalytic hydrolysis of sodium borohydride (NaBH 4) to generate H 2. The hydrogen generation rate was up to 14.87 L H 2 min− 1 g cat− 1 at 318 K with relatively low activation energy of 38.12 kJ mol− 1. Kinetics study confirmed that the hydrolysis of NaBH 4 was first order with respect to concentration of catalysts. Besides, the conversion of NaBH 4 remained at 97% and catalytic activity retained more than 70% after 5 reaction cycles at room temperature. These results suggested that the Ru/rGO NCs have a promising prospect in the field of clean energy.
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