Department of Civil and Environmental Engineering, The George Washington University , Washington, D.C. 20052, United States.
Department of Chemistry, Johns Hopkins University , Baltimore, Maryland 21218, United States.
ACS Appl Mater Interfaces. 2017 Aug 23;9(33):27421-27426. doi: 10.1021/acsami.7b09192. Epub 2017 Aug 14.
Novel Pd-based catalysts (i.e., Pd and Pd-Cu) supported on graphitic carbon nitride (g-CN) were prepared for nitrite and nitrate hydrogenation. The catalysts prepared by ethylene glycol reduction exhibited ultrafine Pd and Pd-Cu nanoparticles (∼2 nm), and they showed high reactivity, high selectivity toward nitrogen gas over byproduct ammonium, and excellent stability over multiple reaction cycles. The unique nitrogen-abundant surface, porous structure, and hydrophilic nature of g-CN facilitates metal nanoparticle dispersion, mass transfer of reactants, and nitrogen coupling for nitrogen gas production to improve catalytic performance.
用于亚硝酸盐和硝酸盐氢化的负载在石墨相氮化碳（g-CN）上的新型 Pd 基催化剂（即 Pd 和 Pd-Cu）被制备出来。通过乙二醇还原法制备的催化剂表现出超细微的 Pd 和 Pd-Cu 纳米颗粒（约 2nm），它们表现出高反应活性、对副产物氨的高氮气选择性以及在多个反应循环中的优异稳定性。g-CN 的独特富氮表面、多孔结构和亲水性有利于金属纳米颗粒的分散、反应物的质量传递以及氮的偶联，从而提高了氮气生成的催化性能。
