The hydrogenation of carbon-carbon double and triple bonds is a fundamental chemical reaction with important applications in the food, petrochemical, and pharmaceutical industries, etc. Traditionally, hydrogenation reactions use a metal catalyst, usually Pd or Pt, with hydrogen gas (H2) as the reductant. Rare metal catalysts are prominent in this field, so if they could be replaced by a more abundant metal such as nickel, this could, in principle, offer a more sustainable alternative. For example, catalysts such as Raney nickel or nickel oxide have been used extensively in hydrogenation reactions. The use of H2 as the reductant gives excellent atom economy, but also presents major drawbacks: hydrogen gas is derived primarily from fossil resources, and it is also a hazardous material. One viable alternative is to use electrochemical water splitting that occurs during the hydrogen evolution reaction (HER) as source of hydrogen atoms. In this way, hydrogen sourcing, transportation and manipulation can be avoided. Electrocatalysts are needed for the HER, and these electrodes are usually dependent on platinum-group metals due to their low overpotential. However, the scarcity and high cost of platinum hinders their widespread application. Ni foams and their modified variants can provide a good balance between activity for the HER, recyclability, and safety. For electrochemical hydrogenations (ECH) using water as hydrogen source, protons generated via water splitting at the anode counter electrode move to the cathode surface, where the reduction of the organic compound or production of dihydrogen happens. Frequently, the ECH of C-C unsaturated compounds is catalyzed by platinum-group metals. For Ni foam, only few examples can be found. Zhang and coworkers reported the semihydrogenation of terminal alkynes to alkenes using a seleniumfunctionalized Ni foam (Ni0.85Se1-x) in a basic aqueous solution as an electrolyte (Scheme 1a). The reaction relies on the presence of selenium on the surface of the Ni foam for optimal catalytic activity. The authors highlighted that the efficiency of the ECH of alkynes into alkenes relied on the exceptional performance of Ni0.85Se1-x in the hydrogen evolution reaction. The Martín-Matute group described the selective semihydrogenation of terminal and of 1,2-disubstituted alkynes using an unfunctionalized commercially available Ni foam as an electrocatalyst in an acidic solution (Scheme 1b). Importantly, control experiments revealed that electrochemically generated nickel hydrides are the key species responsible for the reduction of the alkynes, and therefore hydrogen gas production is here an unwanted parallel process. This was confirmed by control experiments, where the hydrogenation of alkynes does not take place in the presence of hydrogen gas (H2) and the Ni foam, with no applied potential. The Zhang and Martín-Matute systems can both convert alkynes into alkenes very efficiently, but neither can be used for full reduction to saturated derivatives. A recent paper by Najafpour and coworkers described the ECH of styrene using Ni foam as both sacrificial anode and cathode in a single cell configuration, however it requires a very high potential (3.4 V), what limits its applicability. Here we present the use of Ni foam as readily available, abundant, and safe catalyst for the reduction of alkenes into saturated derivatives using water as the hydrogen source (Scheme 1c). Aiming at embracing the safe and sustainable by design concept, a screening life-cycle assessment (LCA) was carried out alongside the method development, to assess the environmental impact of the new process. Carrying out LCA at the early stages of chemical process development presents important challenges, such as defining the functional unit, data availability, definition of system boundaries, and the fact that significant changes might take place when the reaction is scaled-up. Our objectives are two-fold: i) Developing an efficient catalytic method for olefin reduction, guided by environmental and toxicological assessments that identifies areas of concern ("hotspots"); and ii) Evaluating the environmental performance of the Ni foam system, including human toxicity indicators, as a catalytic alternative to the traditional method Pd/C and H2 gas. Scheme 1. a-b) Strategies for the hydrogenation of alkynes using (functionalized) Ni foams under electrochemical conditions. c) This work.