In situ construction of fibrous AgNPs/g-C3N4 aerogel toward light-driven COx-free methanol dehydrogenation at room temperature
In situ construction of fibrous AgNPs/g-C3N4 aerogel toward light-driven COx-free methanol dehydrogenation at room temperature
复制标题
原位构建纤维状 AgNPs/g-C3N4 气凝胶，用于室温下光驱动无 COx 甲醇脱氢
DOI：
10.1016/j.cej.2017.12.016
复制
发表时间：
2018-02-15
影响因子：
15.1
通讯作者：
Xue, Huaiguo
中科院分区：
文献类型：
--
作者：
Liu, Yuanyuan;Yang, Shengyang;Xue, Huaiguo
甲醇被认为是一种有利的氢源介质，因为它的液态便于氢的储存、运输和利用。蒸汽重整是目前化工和氢燃料电池领域最常用的甲醇制氢方法。然而，甲醇重整往往涉及高温高压，大量的资本投资，以及不良的副产品（CO， CO2等）的形成。为了克服这些缺点，在本工作中，我们描述了一种原位组装和逐步热处理的方法来合成纤维状AgNPs/g-C3N4气凝胶，该气凝胶在室温下对纯甲醇的裂解具有有效的光催化活性。令人鼓舞的是，氢气持续产生，而产物中既没有CO也没有CO2，这可能归因于银在AgNPs/g-C3N4气凝胶中的适度氧化还原特性。更重要的是，这种无cox的析氢过程可以防止催化剂中毒，为发展低碳化学开辟了新的机遇。
Methanol has been deemed to be a favorable medium for the source of hydrogen because its liquid nature facilitates the storage, transportation, and utilization of hydrogen. Currently, steam reforming is the most common method to generate hydrogen from methanol in chemical industry and hydrogen fuel cell field. However, methanol reforming often involves high temperature and pressure, massive capital investment, as well as undesirable byproducts (CO, CO2, etc.) formation. To overcome these disadvantages, in this work, we describe an in situ assembly and stepwise thermal treatment method to synthesize fibrous AgNPs/g-C3N4 aerogel, which exhibits efficient photocatalysis activity for the splitting of pure methanol at room temperature. Encouragingly, hydrogen is continuously produced while neither CO nor CO2 is found in the products, which could be attributed to the moderate redox feature of silver in the AgNPs/g-C3N4 aerogel. More importantly, this COx-free hydrogen evolution process can prevent the poisoning of catalysts, opening a new opportunity for developing low-carbon chemistry.