以钨酸钠为钨源,酚醛树脂为碳源,采用溶胶-凝胶法制备WC前驱体,在氩气、氢气混合气氛下高温原位还原碳化制备纳米WC.分别采用浓硝酸和氢气对WC中的残余玻璃碳进行脱碳处理.在含有WC的氯铂酸(H2 PtCl6·6H2O)悬浊液中采用甲醛(HCHO)还原法制备纳米WC负载纳米Pt的复合粒子,将其制作成工作电极,在酸性介质中采用循环伏安法测试工作电极的电化学催化活性.结果表明:所制备的前驱体颗粒粒径为10～20nm,分布均匀;经1000℃还原碳化1h可制备粒径为40～100nm的纳米WC;采用H2高温还原处理可有效去除WC中的残余玻璃碳,经脱碳处理的WC与Pt制成的10％ Pt/WC(质量分数)工作电极在酸性介质中表现出良好的电化学催化活性.
参考文献
| [1] | Kwong-Yu Chan;Jie Ding;Jiawen Ren;Shaoan Cheng;KWOK YING TSANG .Supported mixed metal nanoparticles as electrocatalysts in low temperature fuel cells[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2004(4):505-516. |
| [2] | Zheng HJ;Huang JG;Wang W;Ma CN .Preparation of nano-crystalline tungsten carbide thin film electrode and its electrocatalytic activity for hydrogen evolution[J].Electrochemistry communications,2005(10):1045-1049. |
| [3] | Levy R B;Boudart M .Platinum-like behavior of tungsten carbide in surface catalysis[J].Science,1973,181(4099):547. |
| [4] | Pei Kang Shen;Shibin Yin;Zihui Li;Chan Chen .Preparation and performance of nanosized tungsten carbides for electrocatalysis[J].Electrochimica Acta,2010(27):7969-7974. |
| [5] | Lewandowski M;Da Costa P;Benichou D et al.Catalytic performance of platinum doped tungsten carbide in simultaneous hydrodenitrogenation and hydrodesulphurization[J].Applied Catalysis B:Environmental,2010,93(3/4):241. |
| [6] | 刘珍,梁伟,许并社,市野濑英喜.纳米材料制备方法及其研究进展[J].材料科学与工艺,2000(03):103-108. |
| [7] | 盛江峰,马淳安,张诚,李国华.碳化钨负载纳米铂催化剂的制备及其析氢催化性能[J].物理化学学报,2007(02):181-186. |
| [8] | Meng H;Shen PK .The beneficial effect of the addition of tungsten carbides to Pt catalysts on the oxygen electroreduction[J].Chemical communications,2005(35):4408-4410. |
| [9] | 胡驰,周大利,熊仁金,罗宇智,何宇.纳米WC的合成及Pt/WC电催化性能的研究[J].无机材料学报,2011(11):1152-1156. |
| [10] | 顾翼东.粉状白钨酸的制备[J].高等学校化学学报,1982(01):137. |
| [11] | 谢高阳;纪冠珍 等.无机过氧化物的研究[J].无机化学,1988,4(02):133. |
| [12] | Yannick C. Kimmel;Daniel V. Esposito;Robert W. Birkmire;Jingguang G. Chen .Effect of surface carbon on the hydrogen evolution reactivity of tungsten carbide (WC) and Pt-modified WC electrocatalysts[J].International journal of hydrogen energy,2012(4):3019-3024. |
| [13] | Ganesan R;Ham DJ;Lee JS .Platinized mesoporous tungsten carbide for electrochemical methanol oxidation[J].Electrochemistry communications,2007(10):2576-2579. |
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