CAJ | 학술논문

以MCl_x(M=Pd,Fe,Cr;x=2,3,3)为金属源,辅助合成有序介孔碳(OMC),以改善其负载Pt后的电催化性能.X射线衍射(XRD)和透射电镜(TEM)测试结果显示,适量PdCl_2的引入并未破坏介孔碳的有序结构,由于经历有机碳的高温裂解,OMC-PdCl_2主要以金属Pd为存在形式,较为均一嵌入OMC的骨架中,并在负载Pt的过程中与Pt形成二元催化剂.电化学氢吸附-脱附测试结果表明,Pt/OMC-MCl_x表现出优异的催化性能,电化学活性面积为Pt/OMC的2-4倍;其中Pt/OMC-PdCl_2最佳,活性面积达120.2 m~2·g~(-1),Pt/OMC-CrCl_3和Pt/OMC-FeCl_3次之.此外,Pt/OMC-MCl_x还具有良好的催化稳定性,经100个循环测试后,依然保持较高的催化活性,仅衰减22%-40%,使得该材料在催化领域具有很好的应用前景.
이MCl_x(M=Pd,Fe,Cr;x=2,3,3)위금속원,보조합성유서개공탄(OMC),이개선기부재Pt후적전최화성능.X사선연사(XRD)화투사전경(TEM)측시결과현시,괄량PdCl_2적인입병미파배개공탄적유서결구,유우경력유궤탄적고온렬해,OMC-PdCl_2주요이금속Pd위존재형식,교위균일감입OMC적골가중,병재부재Pt적과정중여Pt형성이원최화제.전화학경흡부-탈부측시결과표명,Pt/OMC-MCl_x표현출우이적최화성능,전화학활성면적위Pt/OMC적2-4배;기중Pt/OMC-PdCl_2최가,활성면적체120.2 m~2·g~(-1),Pt/OMC-CrCl_3화Pt/OMC-FeCl_3차지.차외,Pt/OMC-MCl_x환구유량호적최화은정성,경100개순배측시후,의연보지교고적최화활성,부쇠감22%-40%,사득해재료재최화영역구유흔호적응용전경.
The Pt-loading properties of ordered mesoporous carbon (OMC) synthesized with assistance of MCl_x (M=Pd, Fe, Cr; x=2, 3, 3) were investigated. X-ray diffraction (XRD) and transmission electron microscope (TEM) show that the ordered structure is well-preserved after the introduction of PdCl_2. Because of the pyrolysis of organic carbon the OMC-PdCl_2 is mainly present in the form of metallic Pd and is homogenously embedded into the scaffold of the OMC. A binary catalyst comprised of metallic Pd and microwave-reduced Pt nanoparticles was also generated. Electrochemical hydrogen absorption-desorption tests reveal that Pt/OMC-MCl_x possesses excellent catalytic performance and has an electrochemical active surface area (S_(EA)) being as 2-4 times as that of Pt/OMC. Pt/OMC-PdCl_2 has the highest S_(EA) of 120.2 m~2·g~(-1) followed by Pt/OMC-CrCl_3 and then Pt/OMC-FeCl_3. After a long-term cyclic voltammetric test, Pt/OMC-MCl_x still exhibits excellent catalytic stability and relatively higher catalytic activity as evidenced by a 22%-40% decrease in catalytic activity after one hundred cycles. This work will open up a most promising application in catalysis.