氨硼烷
催化作用
纳米颗粒
材料科学
无机化学
水解
碳纤维
化学工程
掺杂剂
化学
制氢
纳米技术
有机化学
兴奋剂
复合数
工程类
复合材料
光电子学
作者
Yuan He,Yumei Peng,Yi Wang,Yan Long,Guangyin Fan
出处
期刊:Fuel
[Elsevier]
日期:2021-08-01
卷期号:297: 120750-120750
被引量:55
标识
DOI:10.1016/j.fuel.2021.120750
摘要
Functional carbons that can provide abundant anchoring sites for metal nanoparticles (NPs) have shown great promise in boosting the catalytic activity for hydrolysis of ammonia borane (AB), while the synthetic recipes for some of them are complicated, time-consuming and hazardous together with a low yield. Herein, we develop a facile and easily scalable one-pot synthetic strategy to nitrogen-doped carbon skeleton (NCS) via direct pyrolysis of ethylenediamine tetra-acetic acid tetra-sodium salt in air. Attributing to the anchoring sites from abundant nitrogen-dopant and nanoporous structure of NCS, ultrasmall RuNi alloy NPs are highly distributed on NCS. The as-prepared RuNi/NCS can be used as a highly active catalyst for hydrogen production from AB hydrolysis at room temperature. Specifically, the optimal Ru1Ni1.90/NCS delivers an excellent catalytic activity with a very high turnover frequency of 1017 min−1 in basic solution, superior to many previous results. The kinetic studies indicate that AB hydrolysis catalyzed by Ru1Ni1.90/NCS is first-order and zero-order in terms of Ru and AB concentrations, respectively. Additionally, the isotopic analysis reveals that the O–H bond cleavage of water is the rate-determining step. The high catalytic activity of Ru1Ni1.90/NCS can be assigned to the ultrasmall RuNi nanostructure, highly nanoporous carbon matrix, and abundant N-dopant and the synergistic catalysis between the two metals. This study offers a simple synthetic protocol for construction of metal-carbon hybrid toward hydrogen generation from the hydrolysis of chemical storage materials.
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