有色金属科学与工程
有色金屬科學與工程
유색금속과학여공정
JIANGXI NONFERROUS METALS
2015年
3期
40-44
,共5页
石墨烯%铂催化剂%催化性能%稳定性
石墨烯%鉑催化劑%催化性能%穩定性
석묵희%박최화제%최화성능%은정성
graphene%platinum catalyst%catalytic performance%stability
以天然石墨粉为原料，制备了氧化石墨（GO），再以GO和氯铂酸（H2PtCl6）为前驱体，乙二醇作为溶剂和还原剂，通过浸渍还原法成功制备出铂和石墨烯的复合催化剂（Pt/GR）。利用X射线衍射仪、场发射扫描电镜和拉曼光谱仪对样品进行了形貌表征，结果表明Pt颗粒均匀分布在石墨烯的表面，相对于单质，负载有Pt的石墨烯表面更加褶皱且石墨烯片层更加分散。对Pt/GR进行电化学测试并与商用Pt黑催化剂进行对比，结果显示Pt/GR催化剂具有更高的电化学活性面积（ESCA）和更好的电催化性能，相对于Pt黑催化剂，Pt/GR具有更好的电化学稳定性。
以天然石墨粉為原料，製備瞭氧化石墨（GO），再以GO和氯鉑痠（H2PtCl6）為前驅體，乙二醇作為溶劑和還原劑，通過浸漬還原法成功製備齣鉑和石墨烯的複閤催化劑（Pt/GR）。利用X射線衍射儀、場髮射掃描電鏡和拉曼光譜儀對樣品進行瞭形貌錶徵，結果錶明Pt顆粒均勻分佈在石墨烯的錶麵，相對于單質，負載有Pt的石墨烯錶麵更加褶皺且石墨烯片層更加分散。對Pt/GR進行電化學測試併與商用Pt黑催化劑進行對比，結果顯示Pt/GR催化劑具有更高的電化學活性麵積（ESCA）和更好的電催化性能，相對于Pt黑催化劑，Pt/GR具有更好的電化學穩定性。
이천연석묵분위원료，제비료양화석묵（GO），재이GO화록박산（H2PtCl6）위전구체，을이순작위용제화환원제，통과침지환원법성공제비출박화석묵희적복합최화제（Pt/GR）。이용X사선연사의、장발사소묘전경화랍만광보의대양품진행료형모표정，결과표명Pt과립균균분포재석묵희적표면，상대우단질，부재유Pt적석묵희표면경가습추차석묵희편층경가분산。대Pt/GR진행전화학측시병여상용Pt흑최화제진행대비，결과현시Pt/GR최화제구유경고적전화학활성면적（ESCA）화경호적전최화성능，상대우Pt흑최화제，Pt/GR구유경호적전화학은정성。
Graphene oxide(GO) was prepared using grapheme powder as raw material. With GO and H2PtCl6 as precursor and ethylene glycol as solvent and reducing agent, composite catalyst Pt/Graphene was prepared by impregnation-reduction method. The as-prepared Pt/Graphene catalyst is characterized by X-ray powder diffraction, scanning electronmicroscopy and Raman spectroscopy. The results show that the Pt nanoparticles are dispersed into the graphene nanosheets by forming a face centered cubic crystal structure. The stability of the catalyst is evaluated by cyclic voltammetry and chronoamperometry. Compared with commercial catalyst, Pt/Graphene catalyst shows an improved electrochemical active area (ESCA) and electro catalytic activity. The Pt/Graphene catalyst has more favorable stability than the commercial catalyst.
