Pd Nanoparticle Catalysts Supported on Nitrogen-Functionalized Activated Carbon for Oxyanion Hydrogenation and Water Purification
Pd Nanoparticle Catalysts Supported on Nitrogen-Functionalized Activated Carbon for Oxyanion Hydrogenation and Water Purification
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DOI：
10.1021/acsanm.8b01949
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发表时间：
2018-12
影响因子：
5.9
通讯作者：
Tao Ye;N. A. Banek;D. Durkin;Maocong Hu;Xianqin Wang;M. Wagner;Danmeng Shuai
中科院分区：
文献类型：
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作者：
Tao Ye;N. A. Banek;D. Durkin;Maocong Hu;Xianqin Wang;M. Wagner;Danmeng Shuai
我们提供一种高效、可持续、低成本且具有潜在可扩展性的方法来制备用于 Pd 基催化的 N 功能化活性炭 (AC)，并提高水净化性能。 N功能化的AC载体是通过“软氮化”实现的，即低温加热尿素-AC混合物，并且在载体上获得了表面Pd(0)位点数量显着增加的Pd纳米颗粒。此外，Pd 纳米颗粒优先负载在（处理过的）AC 外表面附近。 N-官能化改善了亚硝酸盐和溴酸盐的氢化动力学，但没有改善亚氯酸盐和氯酸盐的氢化动力学，这表明不同的机制决定了这些含氧阴离子的反应活性。
We provide an efficient, sustainable, low-cost, and potentially scalable method to prepare N-functionalized activated carbon (AC) for Pd-based catalysis with improved performance for water purification. N-functionalized AC supports were realized via “soft nitriding”, that is, low temperature heating of a urea–AC mixture, and Pd nanoparticles with a significantly increased number of surface Pd(0) sites were achieved on the supports. Moreover, Pd nanoparticles were preferentially loaded near the (treated) AC exterior surface. N-functionalization improved nitrite and bromate hydrogenation kinetics but not for chlorite and chlorate, suggesting that different mechanisms determine the reaction activity of these oxyanions.