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SeddonΪInorganic Liquids in Synthesis (Second Edition)Ò»ÊéдµÄÐòÑÔÖУ¬ËûдµÀ£º"How many papers within this annual flood of reviews say anything critical, useful, or interesting? How many add value to a list of abstracts which can be generated in five minutes using SciFinder ot the ISI Web of Knowledge? How many of them can themselves be categorised as garbage? It is the twenty-first century----if a review is just an uncritical list of papers and data, what is its value?"µ±È»Ëû»¹Ð´Á˺ܶàÀàËÆµÄ¡°»µ»°¡±£¬¶ÁÆðÀ´ÁîÎҷdz£Ê泩¡£¶Áµ½ÕâÐòÑÔ£¬ÎÒµÄÄÔº£ÖÐÏëÏó³öÒ»¸ö´óºú×ÓÀÏÍ·ÔÚÅØÏø¡¢³âÔð±ðÈË·¢±íÀ¬»øÎÄÕ¡£ ÏÖÔںܶà¸ãÄÉÃ׺ÍÄÉÃ×´ß»¯µÄÈ˶¼¿ñ´µ×Ô¼ºµÄ´ß»¯¼ÁÈçºÎÈçºÎÓÐÓᣵ«ÊÇÊÂʵÉϺܶàÄÉÃ×´ß»¯¼ÁÖ»ÊÇÎüÒýÑÛÇò£¬ËüÃǵÄÖÆ±¸·Ç³£·±Ëö£¬ÎÞ·¨¹¤Òµ»¯¡£¸üºÎ¿öºÜ¶àÎÄÕ±¨µÀµÄÄÉÃ×нṹ´ß»¯¼ÁµÄЧ¹û±ÈÆÕͨÉÌÆ·»¯´ß»¯¼Á¶¼²î£¬ÄÇôµÇɽºÎ±Ø¿¸×Å´¬ÄØ£¿ÔÚÎÒдµÄһƪ¹ØÓڻƽð´ß»¯¼Á×ÛÊöGold Nanoparticles as Chemical Catalysts, in: Nanomaterials: Inorganic and Bioinorganic Perspectives, C.M. Lukehart, R.A. Scott (eds.), John Wiley & Sons, Chichester, 2009ÖУ¬ÎÒÔںܳ¤µÄ½áβ²¿·ÖдÁËÈçÏÂÎÄ×Ö£º One valid question is whether the gold catalysts synthesized by advanced, demanding, and often tedious, synthetic methods or using unique nanostructured supports (e.g., nanotubes and nanobelts) are better than those synthesized via conventional methods or using commercialized supports. As commented in a recent book,12 ¡°Many methods of preparation have been used, but one wonders why some people have laboured to develop very sophisticated methods while others have been content with a much simpler method, apparently giving the same result, namely, the desired small gold particles.¡± The answer to that question is certainly ambiguous. On the one hand, modern nanotechnology can indeed help with the design of many gold catalysts with improved catalytic performance that can not be achieved by using conventional methods. On the other hand, one can find many publications focusing on the synthesis part, with the catalytic performance not reported or very low.12 One pitfall may be that some gold catalysts may contain residual capping agents and/or organic fragments. These organic fragments, if not sufficiently removed by special treatments, may poison CO oxidation, although gold catalysts with organic fragments may still show some activity in certain organic reactions. This point was sometimes overlooked, and thus undermining the real performance of these advanced gold catalysts. How to properly remove the organic fragments while avoiding the sintering of gold nanoparticles is a challenge. Even if this challenge is overcome, many factors still have to be considered before there can be large-scale utilization of gold catalysts synthesized by advanced technology. ÔÚÕâÀÎÒų⵽ÏÖÔںܶàÈ˱¨µÀÄÉÃ×´ß»¯¼Á£¬ËµÐ§¹ûÔõôÔõôºÃ¡£¿ÉÊÇÒ»¶ÁÎÄÕ£¬·¢ÏÖ´ß»¯¼ÁЧ¹ûºÜ²î£¬»òÕ߸ù±¾¾ÍûÓб¨µÀ£¡Ã»Óб¨µÀ¿ÉÄÜÊÇÓÉÓÚÁ½ÖÖÔÒòÒýÆðµÄ£ºÒ»ÊǵÄȷûÓÐ×ö£»¶þÊÇ×öÁË£¬·¢ÏÖЧ¹û²»ºÃ¶øÃ»Óб¨µÀ¡£Õâ²»ÊÇÎóµ¼¶ÁÕßÂ𣿵ÇɽºÎ±Ø¿¸×Å´¬£¿Óø´ÔÓ·½·¨µÄÈÆÍä×ӺϳÉÁËÒ»¶Ñ·ÏÎЧ¹û±ÈÆÕͨ´ß»¯¼Á²î£¬ÕâÑùµÄÎÄÕÂÓмÛÖµÂð£¿Ó¦¸ÃÔõÑù¿ÆÑ§¿´´ýÕâ¸öÎÊÌ⣿ÔÚÎÒдÏÂÕâЩÎÄ×ֺ󣬱à¼Ð´À´ÐÅ¡£±à¼ËµËû×Ðϸ¶ÁÁËÕâÆªÎÄÕ£¬Ð´µÃ·Ç³£ºÃ£¬ËûÓÈÆäÌØ±ðÐÀÉÍÎÒÕâÒ»¶Î»°£¬·´Ó³ÁËcritical thinking¡£±¾À´Àϰå˵ÎÒÌ«critical£¬µ«ÊǼÈÈ»±à¼¶¼¿ä½±ÎÒ£¬ËûÒ²²»ËµÊ²Ã´ÁË¡£ ÒÔÏÂÒ»¶ÎÎÄ×Ö£¬È¡×ÔÎÒ×î½üһƪµÚ¶þ×÷ÕßÎÄÕÂÒýÑÔ²¿·ÖµÄ×îºóÒ»¶Î¡£Çé¿öÊÇÔÚÎÒдÏÂÒÔÏÂÎÄ×Ö֮ǰ£¬ËûÃÇÒѾ·¢±íÁËһƪ¼ò¶ÌµÄ¿ì±¨¡£Ò»°ãÈ˵Äд·¨ÊÇÒþÂ÷²»±¨»òÕßÒ»±Ê´ø¹ý£¬µ«ÊÇÎÒÑ¡ÔñÁ˺Á²»Î·¾å¡¢´óƪ·ù¡°ÓÃæÖ±»÷¡±£¡Ò»ÉÏÀ´¾ÍÌôÃ÷ÒѾ·¢±íÁ˿챨£¬µ«ÊÇʲôʲô²»Çå³þ£¬Ã»ÓÐÏêϸ±¨µÀ»òÕßÏêϸÌÖÂÛ£¬Òò´Ë±¾ÎľÍÊÇÒªÃÖ²¹ÕâЩ¿Õȱ¡£È»ºóÎұʷæÒ»×ª£¬ÓûÁúµã¾¦Ö®±Ê˵Çå³þ±¾ÎĵÄÁ½¸öÒâÒåºÍ¹±Ïס£ÕâÖÖºÁ²»Î·¾å¡¢ÓÃæÖ±»÷µÄ̬¶È²©µÃÁËÉó¸åÈ˵ĺøС£Éó¸åÈ˶¼ËµËäÈ»×÷ÕßÒѾ·¢±íÁËһƪ¿ì±¨£¬µ«ÊDZ¾ÎĵÄÈ·ÓÐÐÂÄÚÈݺÍÖØÒªÐÔ£¬Ð¡ÐÞ¸Äºó·¢±í¡£ The main part of our previous short communication26 focused on the in-depth characterization of ... alloy NPs and an ...... catalyst prepared under optimal conditions, whereas the influences of synthesis parameters on the resulting products, the synthesis mechanism, the critical roles of pretreatment conditions and catalyst compositions in determining catalytic performance, as well as the contribution of the work to the fields of bimetallic materials synthesis and gold catalysis were not reported or elaborated in detail. Therefore, we expand on these aspects more explicitly in the current paper. There are two significant aspects of the work described in this paper. First, the synthesis of size-controlled and homogeneous ... alloy NPs has been found to be extremely evasive to date.15 Hence, the low-temperature solution-phase synthesis of ... alloy NPs with well controlled shape and sizes should be an important progress that may inspire subsequent bimetallic materials synthesis. Second, catalysis by gold nanoparticles has been intensively studied recently,28-33 but the use of alloy NPs as precursors to design advanced catalysts with multiple components (i.e., active metal, metal oxide modifier/promoter, solid support) and tailored interfacial structures has been rarely reported. Hence, this work may be of interest to both materials scientists and those working in the area of catalyst design. ¶ÁÁËÒÔÉÏÕâ¶ÎÎÄ×Ö£¬¿ÉÒÔ¿´³ö×÷ÕßÐÅÐÄÊ®×ã¡¢ÖÀµØÓÐÉù£¬Ò»µãÒ²²»ÍËÈ´¡¢Î·Ëõ¡£²»µ«ÊÂÏÈ̹³ÏµØËµÇå³þ£¬½â¾öÁËÉó¸åÈ˵ÄÒÉÂÇ£¬»¹¶ÔÎÄÕµÄÒâÒåÓÐ×ÜÌå°ÑÎÕ£¬Äܹ»°ÑÖØÒªÐÔÓá°»Áúµã¾¦¡±Ö®±Ê˵³öÀ´£¬ÎªÉó¸åÈËдÕýÃæµÄÉó¸åÒâ¼ûÌṩ²Î¿¼¡£ [ Last edited by zhenmafudan on 2009-2-23 at 00:44 ] |
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