CAJ | 학술논문

为了克服传统Pt系催化剂价格昂贵、稳定性差的缺点，采用热解新型TiO2/聚苯胺(PANI)复合物的方法合成了TiO2/C催化剂。用扫描电子显微镜、X射线光电子能谱、X射线衍射、傅里叶变换红外光谱、拉曼光谱、透射电子显微镜、循环伏安法和线性扫描伏安法等方法研究了热处理和PANI复合比例对复合物的形貌、成键、晶相组成及氧还原性能的影响。结果表明， PANI与TiO2间存在相互作用，可以抑制TiO2的团聚和锐钛矿向金红石的转变。热处理制得TiO2/C的氧还原活性随着PANI载体含量增加先升高后降低， PANI和TiO2质量比为35/100时，催化剂的氧还原活性最高。同时，循环伏安和时间-电流曲线测试表明，已制备的复合材料在催化氧还原反应进行时具有较好的稳定性。
위료극복전통Pt계최화제개격앙귀、은정성차적결점，채용열해신형TiO2/취분알(PANI)복합물적방법합성료TiO2/C최화제。용소묘전자현미경、X사선광전자능보、X사선연사、부리협변환홍외광보、랍만광보、투사전자현미경、순배복안법화선성소묘복안법등방법연구료열처리화PANI복합비례대복합물적형모、성건、정상조성급양환원성능적영향。결과표명， PANI여TiO2간존재상호작용，가이억제TiO2적단취화예태광향금홍석적전변。열처리제득TiO2/C적양환원활성수착PANI재체함량증가선승고후강저， PANI화TiO2질량비위35/100시，최화제적양환원활성최고。동시，순배복안화시간-전류곡선측시표명，이제비적복합재료재최화양환원반응진행시구유교호적은정성。
To overcome the prohibitive cost and poor durability of conventional Pt‐based catalysts, TiO2/C was prepared by pyrolyzing a novel titanium dioxide/polyaniline (TiO2/PANI) composite. The prepared catalysts were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X‐ray photoelectron spectroscopy, X‐ray diffraction, cyclic voltammetry (CV), and linear sweep voltammetry. Interaction between PANI and TiO2 was found to inhibit the aggregation of TiO2 and its transformation from anatase to rutile. The catalytic activity of the TiO2/C first increased with increasing PANI content and then decreased; the optimum was achieved when the PANI/TiO2 mass ratio was 35/100. CV and i–t curves showed that the prepared composite has a good catalytic stability.