PROBLEM TO BE SOLVED: To provide an ethylene decomposition agent easy to control the physical properties and performance thereof as a catalyst using for catalytic decomposition reaction of ethylene, easy to procure and prepare and enabling continuous use at low temperature, and to provide an ethylene decomposition method using the decomposition agent, a freshness retaining agent and a freshness retaining method for plants, and articles equipped therewith.SOLUTION: An ethylene decomposition agent is obtained by carrying platinum or a platinum-containing compound on a porous silica and is used for decomposing ethylene into carbon dioxide and water in the presence of oxygen under the atmosphere of -1 to -40°C. A plant freshness-retaining agent is obtained by carrying platinum or the platinum-containing compound on the porous silica and retains the freshness of plant by decomposing ethylene discharged from the plant into carbon dioxide and water in the presence of oxygen under the atmosphere of -1 to -40°C. The present invention also provides articles equipped with the ethylene decomposition agent and the freshness retaining agent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】エチレンの触媒分解反応に用いる触媒として、性状や性能等を制御し易く、入手や調製が容易であり、さらに低温での継続的な使用が可能なエチレン分解剤及び該分解剤を用いたエチレンの分解方法、植物の鮮度保持剤及び鮮度保持方法、並びにこれらを備えた物品を提供すること。【解決手段】多孔質シリカに白金又は白金含有化合物を担持させてなるエチレン分解剤であって、酸素の存在下、-1~-40℃の雰囲気下で、エチレンを二酸化炭素と水に分解するための、エチレン分解剤、多孔質シリカに白金又は白金含有化合物を担持させてなる植物の鮮度保持剤であって、酸素の存在下、-1~-40℃の雰囲気下で、植物から放出されるエチレンを二酸化炭素と水に分解して植物の鮮度を保持する鮮度保持剤、及び該エチレン分解剤又該鮮度保持剤を備える、物品。【選択図】なし
